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Perseid Meteors vs. the Supermoon
Perseid Meteors vs. the Supermoon
In a normal year, dark-sky observers typically count more than 100 Perseids per hour. But this is no normal year.Read More...
Rosetta Comet Comes Alive
Rosetta Comet Comes Alive
A spacecraft from Earth is about to do something no spacecraft has ever done before: orbit a comet and land on its surface.Read More...
A New Meteor Shower in May?
A New Meteor Shower in May?
The shower is the May Camelopardalids, caused by dust from periodic comet 209P/LINEAR. No one has ever seen it before, but this year the Camelopardalids could put on a display that rivals the well-known Perseids of August.Read More...
The Opposition of Mars
The Opposition of Mars
By the time you finish reading this story, you'll be about 1,000 km closer to the planet Mars.Read More...
Countdown to Pluto
Countdown to Pluto
Are we there yet? One of the fastest spacecraft ever built -- NASA's New Horizons -- is nearing its destination.Read More...
Comet ISON vs. the Solar Storm
Comet ISON vs. the Solar Storm
In 2007, astronomers were amazed when a solar storm hit comet Encke. The same thing could be in store for comet ISON -- only worse.Read More...
Two Comets to Fly By Mercury
Two Comets to Fly By Mercury
What are the odds? On Nov. 18th and 19th not one but two comets will fly by the planet Mercury.Read More...
Comet ISON: What's Next?
Comet ISON: What's Next?
Comet ISON is now inside the orbit of Earth as it plunges headlong toward the sun for a fiery close encounter on Nov. 28th. Although the comet is not yet as bright as many forecasters predicted, the comet is putting on a good show for observatories ...Read More...
MAVEN Solar Wind Electron Analyzer Seeks Answers at Microscopic Levels
MAVEN Solar Wind Electron Analyzer Seeks Answers at Microscopic Levels
When the Mars Atmosphere and Volatile Evolution Mission launches in November to study why the Red Planet is losing its atmosphere, one of its instruments will look to electrically charged particles called electrons for answers.Read More...
It's Complicated: Dawn Spurs Rewrite of Vesta's Story
It's Complicated: Dawn Spurs Rewrite of Vesta's Story
Just when scientists thought they had a tidy theory for how the giant asteroid Vesta formed, a new paper from NASA's Dawn mission suggests the history is more complicated.Read More...
The Sounds of Interstellar Space
The Sounds of Interstellar Space
It turns out that space can make music ... if you know how to listen.Read More...
Rosetta: 100 Days to Wake-Up
Rosetta: 100 Days to Wake-Up
ESA's comet-chasing mission Rosetta will wake up in 100 days' time from deep-space hibernation to reach the destination it has been cruising towards for a decade.Read More...
Planetary Seasons
Planetary Seasons
Planetary seasons are caused by two factors: axial tilt and variable distance from the sun (orbital eccentricity).Read More...
Dawn Reality-Checks Telescope Studies of Asteroids
Dawn Reality-Checks Telescope Studies of Asteroids
In a paper, Vishnu Reddy and other members of Dawn's framing camera team describe how up-close observations of Vesta have confirmed and provided new insights into more than 200 years of Earth-based observations.Read More...
Amateur Astronomers See Comet ISON
Amateur Astronomers See Comet ISON
Anticipation is building as Comet ISON approaches the sun for a close encounter on Thanksgiving Day (Nov. 28). No one knows if the blast of solar heating ISON receives will turn it into one of the finest comets in years -- or destroy the icy visitor.Read More...
Watch Out for the Harvest Moon
Watch Out for the Harvest Moon
According to folklore, every full Moon has a special name. There's the Wolf Moon, the Snow Moon, the Worm Moon, the Sprouting Grass Moon, the Flower Moon, the Strawberry Moon, the Thunder Moon, the Sturgeon Moon, the Harvest Moon ...Read More...
How Do We Know When Voyager Reaches Interstellar Space?
How Do We Know When Voyager Reaches Interstellar Space?
Whether and when NASA's Voyager 1 spacecraft, humankind's most distant object, broke through to interstellar space, the space between stars, has been a thorny issue.Read More...
Off the Earth, for the Earth
Off the Earth, for the Earth
Space exploration has always created benefits for humankind -- from new technologies and discoveries, to deepening international relationships and inspiring young people to pursue careers in science, technology, engineering and math.Read More...
NASA Mission To Study Mysterious Lunar Twilight Rays
NASA Mission To Study Mysterious Lunar Twilight Rays
Back in the 60s and 70s, Apollo astronauts circling the Moon saw something that still puzzles researchers today. About 10 seconds before lunar sunrise or lunar sunset, pale luminous streamers would pop up over the gray horizon.Read More...
Space Laser To Prove Increased Broadband Possible
Space Laser To Prove Increased Broadband Possible
When NASA's Lunar Laser Communication Demonstration (LLCD) begins operation aboard the Lunar Atmosphere and Dust Environment Explorer (LADEE) mission managed by NASA's Ames Research Center in Moffett Field, Calif., it will attempt to show two-way laser...Read More...
Comet ISON to fly by Mars
Comet ISON to fly by Mars
Around the world, astronomers are buzzing with anticipation over the approach of Comet ISON.Read More...
New Imagery of Asteroid Mission
New Imagery of Asteroid Mission
NASA released Aug. 22 new photos and video animations depicting the agency's planned mission to find, capture, redirect, and study a near-Earth asteroid.Read More...
Around the World in Four Days: NASA Tracks Chelyabinsk Meteor Plume
Around the World in Four Days: NASA Tracks Chelyabinsk Meteor Plume
Atmospheric physicist Nick Gorkavyi missed witnessing an event of the century last winter when a meteor exploded over his hometown of Chelyabinsk, Russia. From Greenbelt, Md., however, NASA's Gorkavyi and colleagues witnessed a never-before-seen view ...Read More...
Heliophysics Nugget: Mapping Tons of Meteoric Dust in the Sky
Heliophysics Nugget: Mapping Tons of Meteoric Dust in the Sky
On Aug.11 and 12, 2013, the annual Perseid meteor shower will peak, filling the sky with streaks of light, commonly known as shooting stars.Read More...
MAVEN Eyes Mars as Launch Preps Begin
MAVEN Eyes Mars as Launch Preps Begin
MAVEN's approach to Mars studies will be quite different from that taken by recent probes dispatched to the Red Planet.Read More...
If We Landed on Europa, What Would We Want to Know?
If We Landed on Europa, What Would We Want to Know?
A new paper lays out the key science questions to answer for any future proposed robotic spacecraft missions to the surface of Jupiter's icy moon Europa.Read More...
The Sun's Magnetic Field is about to Flip
The Sun's Magnetic Field is about to Flip
Something big is about to happen on the sun. According to measurements from NASA-supported observatories, the sun's vast magnetic field is about to flip.Read More...
Laser Communications Set for Moon Mission
Laser Communications Set for Moon Mission
An advanced laser system offering vastly faster data speeds is now ready for linking with spacecraft beyond our planet following a series of crucial ground tests.Read More...
Perseid Fireballs
Perseid Fireballs
In astronomy, there's nothing quite like a bright meteor streaking across the glittering canopy of a moonless night sky. The unexpected flash of light adds a dash of magic to an ordinary walk under the stars.Read More...
Pale Blue Dot: Distant Spacecraft Photograph Earth
Pale Blue Dot: Distant Spacecraft Photograph Earth
Color and black-and-white images of Earth taken by two NASA interplanetary spacecraft on July 19 show our planet and its moon as bright beacons from millions of miles away in space.Read More...
Mystery of the Missing Waves on Titan
Mystery of the Missing Waves on Titan
One of the most shocking discoveries of the past 10 years is how much the landscape of Saturn's moon Titan resembles Earth.Read More...
Target Asteroid Tracked by European Teams
Target Asteroid Tracked by European Teams
In a recent close-ish flyby, asteroid 2002 GT was studied in detail for the first time by a network of European astronomers.Read More...
Evidence for a Martian Ocean
Evidence for a Martian Ocean
Researchers at the California Institute of Technology (Caltech) have discovered evidence for an ancient delta on Mars where a river might once have emptied into a vast ocean.Read More...
A Timeline Of Comet ISON's Dangerous Journey
A Timeline Of Comet ISON's Dangerous Journey
A comet's journey through the solar system is perilous. Comet ISON is making that journey.Read More...
The First Interplanetary Photobomb
The First Interplanetary Photobomb
Consider it the first interplanetary photobomb. On July 19th, NASA's Cassini spacecraft will photograph Earth through the rings of Saturn--and NASA wants you to jump into the shot.Read More...
Hubble Finds New Neptune Moon
Hubble Finds New Neptune Moon
While analyzing Neptune photos taken by the Hubble Space Telescope, astronomer Mark Showalter of the SETI Institute noticed an extra white dot about 65,400 miles from Neptune, located between the orbits of the moons Larissa and Proteus.Read More...
NASA Spacecraft Maps the Solar System's Tail
NASA Spacecraft Maps the Solar System's Tail
Like a comet, the solar system has a tail. NASA's Interstellar Boundary Explorer (IBEX) has for the first time mapped out the structure of this tail, which is shaped like a four-leaf clover.Read More...
Opportunity's Improbable Anniversary
Opportunity's Improbable Anniversary
Few, if any, imagined that Opportunity would still be roving the red sands of Mars -- and still making discoveries -- ten years later.Read More...
Voyager 1 Approaches Interstellar Space
Voyager 1 Approaches Interstellar Space
Three new papers published in today's issue of Science suggest that Voyager 1, now more than 18 billion kilometers from the sun, is closer to becoming the first human-made object to reach interstellar space.Read More...
Cassini to Photograph Earth From Deep Space
Cassini to Photograph Earth From Deep Space
NASA's Cassini spacecraft will photograph Saturn and its entire ring system during a total eclipse of the sun. Cassini has done this twice before during its previous 9 years in orbit, but this time will be different.Read More...
Ten Thousandth Near-Earth Object Discovered
Ten Thousandth Near-Earth Object Discovered
More than 10,000 asteroids and comets that can pass near Earth have now been discovered. The 10,000th near-Earth object, asteroid 2013 MZ5, was first detected on the night of June 18, 2013, by the Pan-STARRS-1 telescope.Read More...
Comet ISON: What's in a Name?
Comet ISON: What's in a Name?
Credit for comet ISON's name goes to its discovers: Vitali Nevski and Artyom Novinchonok.Read More...
Noctilucent Clouds, Comets, and Meteor Showers
Noctilucent Clouds, Comets, and Meteor Showers
This summer northern skywatchers may be able to see Noctilucent or "Night Shining" Clouds. Also called PMCs (Polar Mesospheric Clouds), these apparitions are a bit of a puzzle for scientists because it is not entirely clear how they form.Read More...
Noctilucent Clouds Get an Early Start
Noctilucent Clouds Get an Early Start
Every summer, something strange and wonderful happens high above the north pole. Ice crystals begin to cling to the smoky remains of meteors, forming electric-blue clouds with tendrils that ripple hypnotically against the sunset sky.Read More...
Dry Ice
Dry Ice "Snowboards" on Mars
NASA research indicates hunks of frozen carbon dioxide -- dry ice -- may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.Read More...
Approaching Asteroid Has Its Own Moon
Approaching Asteroid Has Its Own Moon
Approaching asteroid 1998 QE2 has a moon.Read More...
Planets Aligning in the Sunset Sky
Planets Aligning in the Sunset Sky
The sunset of May 26th will be extra special. On that date, Venus, Jupiter and Mercury will gather in the fading twilight to form a bright triangle only three degrees wide.Read More...
See Saturn at its Best and Brightest
See Saturn at its Best and Brightest
At the end of April, Saturn will put on a breathtaking display.Read More...
Comet ISON Meteor Shower
Comet ISON Meteor Shower
Anticipation is building as Comet ISON plunges into the inner solar system for a close encounter with the sun in November 2013. Blasted at point-blank range by solar radiation, the sungrazer will likely become one of the finest comets in many years.Read More...
The Long and Storied Path to Human Asteroid Exploration
The Long and Storied Path to Human Asteroid Exploration
Within NASA's new FY2014 budget proposal lies a project known as the Asteroid Retrieval and Utilization Mission.Read More...
NASA's Asteroid Initiative Benefits From Rich History
NASA's Asteroid Initiative Benefits From Rich History
NASA's FY2014 budget proposal includes a plan to robotically capture a small near-Earth asteroid and redirect it safely to a stable orbit in the Earth-moon system where astronauts can visit and explore it.Read More...
NASA Celebrates Four Decades of Plucky Pioneer 11
NASA Celebrates Four Decades of Plucky Pioneer 11
Forty years ago, on April 5, 1973, a small, ambitious spacecraft launched from Cape Canaveral, heading towards the third-brightest point of light in the night sky.Read More...
Collision Course? A Comet Heads for Mars
Collision Course? A Comet Heads for Mars
A comet is heading for Mars, and there is a chance that it might hit the Red Planet in October 2014. An impact wouldn't necessarily mean the end of NASA's Mars program. But it would transform the program along with Mars itself.Read More...
Measuring Mars: The MAVEN Magnetometer
Measuring Mars: The MAVEN Magnetometer
When the Mars Atmosphere and Volatile Evolution (MAVEN) mission begins its journey to the Red Planet in 2013, it will carry a sensitive magnetic-field instrument built and tested by a team at NASA's Goddard Space Flight Center in Greenbelt, Md.Read More...
NASA's LRO Sees GRAIL's Explosive Farewell
NASA's LRO Sees GRAIL's Explosive Farewell
Many spacecraft just fade away, drifting silently through space after their mission is over, but not GRAIL. NASA's twin GRAIL (Gravity Recovery and Interior Laboratory) spacecraft went out in a blaze of glory Dec. 17, 2012, ...Read More...
Sunset Comet
Sunset Comet
For a comet, visiting the sun is risky business. Fierce solar heat vaporizes gases long frozen in the fragile nucleus, breaking up some comets and completely destroying others.Read More...
What Exploded over Russia?
What Exploded over Russia?
"It was a meteor strike--the most powerful since the Tunguska event of 1908," says Bill Cooke of NASA's Meteoroid Environment Office.Read More...
50 Years of Robotic Planetary Exploration: David Kring, Senior Staff Scientist, Universities Space Research Association, Houston; Principal Investigator, LPI-JSC
50 Years of Robotic Planetary Exploration: David Kring, Senior Staff Scientist, Universities Space Research Association, Houston; Principal Investigator, LPI-JSC
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
One Close Fly-by: DA14 - What We Learn from NEOs
One Close Fly-by: DA14 - What We Learn from NEOs
On February 15, 2013, asteroid 2012 DA14, a 50-meter stony asteroid, will pass the Earth at a distance of about 27,680 kilometers (17,200 miles).Read More...
Possible Seismic Activity on Asteroid 2012 DA14
Possible Seismic Activity on Asteroid 2012 DA14
For eons, Earth has felt the tremors of asteroids striking our planet. From the extinction of the dinosaurs 65 million years ago to the felled forests around Tunguska in 1908, the space rocks keep coming. This week, Earth strikes back.Read More...
Asteroid DA14 Flyby Toolkit
Asteroid DA14 Flyby Toolkit
Everything you need to know about Friday's historic asteroid flyby.Read More...
50 Years of Robotic Planetary Exploration: Julie Castillo-Rogez, Planetary Geophysicist at the Jet Propulsion Laboratory (JPL)
50 Years of Robotic Planetary Exploration: Julie Castillo-Rogez, Planetary Geophysicist at the Jet Propulsion Laboratory (JPL)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Mike Malin, President and Chief Scientist, Malin Space Science Systems
50 Years of Robotic Planetary Exploration: Mike Malin, President and Chief Scientist, Malin Space Science Systems
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
A Possible Naked-eye Comet in March
A Possible Naked-eye Comet in March
An Oort Cloud comet could be heading our way now.Read More...
State of the Solar System
State of the Solar System
As the president prepares to give his annual State of the Union Address, we offer our own update from the ongoing exploration of our cosmic neighborhood.Read More...
Asteroid 2012 DA14 - Earth Flyby Reality Check
Asteroid 2012 DA14 - Earth Flyby Reality Check
Small near-Earth asteroid 2012 DA14 will pass very close to Earth on February 15, so close that it will pass inside the ring of geosynchronous weather and communications satellites.Read More...
Record Setting Asteroid Flyby
Record Setting Asteroid Flyby
On Feb. 15th an asteroid about half the size of a football field will fly past Earth closer than many man-made satellites. Since regular sky surveys began in the 1990s, astronomers have never seen an object so big come so close to our planet.Read More...
50 Years of Robotic Planetary Exploration: Neil Gehrels, Astrophysicist at NASA's Goddard Spaceflight Center
50 Years of Robotic Planetary Exploration: Neil Gehrels, Astrophysicist at NASA's Goddard Spaceflight Center
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: William Sjogren, Senior Research Scientist (Retired), Jet Propulsion Laboratory
50 Years of Robotic Planetary Exploration: William Sjogren, Senior Research Scientist (Retired), Jet Propulsion Laboratory
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Earth at Perihelion
Earth at Perihelion
In January, our planet made its annual closest approach to the sun. But don't expect things to warm up.Read More...
What's Next for NASA: 2013
What's Next for NASA: 2013
In 2013, NASA will push ahead with an ambitious exploration program, continuing crew flights and commercial resupply missions to the International Space Station, and advancing the systems needed to send humans deeper into space.Read More...
Big Asteroid Tumbles Harmlessly Past Earth
Big Asteroid Tumbles Harmlessly Past Earth
Asteroid 4179 Toutatis is tumbling past Earth this week. Astronomers are taking advantage of the flyby to ping the space rock using NASA radars and obtain images of unprecedented clarity.Read More...
A New Meteor Shower in December?
A New Meteor Shower in December?
If you're outdoors after sunset this week, be alert for meteors. Not only is the Geminid meteor shower active as Earth passes through a stream of debris from "rock comet" 3200 Phaethon, but also a new meteor shower could make an appearance.Read More...
50 Years of Robotic Planetary Exploration: Claudia Alexander, Project Scientist at the Jet Propulsion Laboratory
50 Years of Robotic Planetary Exploration: Claudia Alexander, Project Scientist at the Jet Propulsion Laboratory
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Anita Cochran (Assistant Director of the McDonald Observatory and a Senior Research Scientist at the University of Texas at Austin)
MESSENGER Finds New Evidence for Water Ice at Mercury's Poles
MESSENGER Finds New Evidence for Water Ice at Mercury's Poles
New observations by the MESSENGER spacecraft provide compelling support for the long-held hypothesis that Mercury harbors abundant water ice and other frozen volatile materials in its permanently shadowed polar craters.Read More...
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Nancy Grace Roman (Retired Chief of NASA's Astronomy and Relativity Programs at NASA Headquarters)
50 Years of Robotic Planetary Exploration: Nancy Grace Roman (Retired Chief of NASA's Astronomy and Relativity Programs at NASA Headquarters)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Ayanna Howard (Robotics Engineer at Georgia Institute of Technology)
50 Years of Robotic Planetary Exploration: Ayanna Howard (Robotics Engineer at Georgia Institute of Technology)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Wide Awake in the Sea of Tranquillity
Wide Awake in the Sea of Tranquillity
Neil Armstrong was supposed to be asleep. The moonwalking was done. The moon rocks were stowed away. His ship was ready for departure. In just a few hours, the Eagle's ascent module would blast off the Moon, something no ship had ever done before ...Read More...
50 Years of Robotic Planetary Exploration: Ralph Carruth (Manager, Materials and Processes Laboratory at NASA's Marshall Space Flight Center)
50 Years of Robotic Planetary Exploration: Ralph Carruth (Manager, Materials and Processes Laboratory at NASA's Marshall Space Flight Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Amanda Hendrix (Planetary Scientist at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Amanda Hendrix (Planetary Scientist at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Mars Rover Curiosity in Familiar Ground
Mars Rover Curiosity in Familiar Ground
The SUV-sized Mars rover Curiosity now finds itself just where scientists wanted it: at the northern edge and rim of Gale Crater. What's remarkable is how familiar the landscape looks.Read More...
50 Years of Robotic Planetary Exploration: Cassie Conley (Planetary Protection Officer at NASA Headquarters)
50 Years of Robotic Planetary Exploration: Cassie Conley (Planetary Protection Officer at NASA Headquarters)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Suzanne Dodd (Project Manager for the Voyager Interstellar Mission at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Suzanne Dodd (Project Manager for the Voyager Interstellar Mission at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Dave Doody (Realtime Flight Operations Lead Engineer at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Dave Doody (Realtime Flight Operations Lead Engineer at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Paolo Bellutta (Machine Vision Group/Mars Exploration Rover Driver at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Paolo Bellutta (Machine Vision Group/Mars Exploration Rover Driver at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Paul Spudis (Lunar Geologist at the Lunar and Planetary Institute)
50 Years of Robotic Planetary Exploration: Paul Spudis (Lunar Geologist at the Lunar and Planetary Institute)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Steve Vance (Planetary Scientist/Astrobiologist at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Steve Vance (Planetary Scientist/Astrobiologist at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Venus, a Planetary Portrait of Inner Beauty
Venus, a Planetary Portrait of Inner Beauty
A Venus transit across the face of the sun is a relatively rare event -- occurring in pairs with more than a century separating each pair. There have been all of 53 transits of Venus across the sun between 2000 B.C. and the last one in 2004.Read More...
Solar Eclipse this Weekend
Solar Eclipse this Weekend
On Sunday, May 20th, the Moon will pass in front of the sun, transforming sunbeams across the Pacific side of Earth into fat crescents and thin rings of light.Read More...
A New Count of Potentially Hazardous Asteroids
A New Count of Potentially Hazardous Asteroids
Observations from NASA's Wide-field Infrared Survey Explorer (WISE) have led to the best assessment yet of our solar system's population of potentially hazardous asteroids.Read More...
50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Rubber Chicken Flies into Solar Radiation Storm
Rubber Chicken Flies into Solar Radiation Storm
Launching a rubber chicken into a solar storm might sound strange, but the students had good reason: They're doing an astrobiology project.Read More...
50 Years of Robotic Planetary Exploration: Robert Pappalardo (Project Scientist at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Robert Pappalardo (Project Scientist at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: David Grinspoon (Curator of Astrobiology at the Denver Museum of Nature and Science)
50 Years of Robotic Planetary Exploration: David Grinspoon (Curator of Astrobiology at the Denver Museum of Nature and Science)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
The Fireballs of February
The Fireballs of February
In the middle of the night on February 13th, something disturbed the animal population of rural Portal, Georgia. Cows started mooing anxiously and local dogs howled at the sky. The cause of the commotion was a rock from space.Read More...
Solar Eclipse over the USA
Solar Eclipse over the USA
Mark your calendar. On Sunday, May 20th, the sun is going to turn into a ring of fire. It's an annular solar eclipse--the first one in the USA in almost 18 years.Read More...
Comet Corpses in the Solar Wind
Comet Corpses in the Solar Wind
A paper published in today's issue of Science raises an intriguing new possibility for astronomers: unearthing comet corpses in the solar wind. The new research is based on dramatic images of a comet disintegrating in the sun's atmosphere last July.Read More...
50 Years of Robotic Planetary Exploration: Fran Bagenal (Professor of Astrophysical and Planetary Sciences at the University of Colorado, Boulder and Co-Investigator for the New Horizons Mission)
Kepler Discovers Earth-size Exoplanets
Kepler Discovers Earth-size Exoplanets
NASA's Kepler spacecraft has found two Earth-sized planets orbiting a distant sun-like star.Read More...
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Robert Mitchell (Cassini Program Manager at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Robert Mitchell (Cassini Program Manager at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Comet Lovejoy Plunges into the Sun ... and Survives
Comet Lovejoy Plunges into the Sun ... and Survives
Sungrazing Comet Lovejoy has shocked astronomers by surviving its "death plunge" into the sun. Must-see movies of the comet's passage through the sun's atmosphere are featured in today's story from Science@NASA.Read More...
50 Years of Robotic Planetary Exploration: Amy Simon-Miller (Astrophysicist at the Goddard Space Flight Center)
50 Years of Robotic Planetary Exploration: Amy Simon-Miller (Astrophysicist at the Goddard Space Flight Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
"Slam Dunk" Sign of Ancient Water on Mars
As NASA's newest Mars rover Curiosity heads for the Red Planet, veteran rover Opportunity continues to make discoveries. Opportunity's latest find, an apparent vein of the mineral gypsum, is a "slam dunk" sign of past water on Mars, say researchers.Read More...
Preparing for Future Human Exploration: Measuring the Radiation Environment on Mars
Preparing for Future Human Exploration: Measuring the Radiation Environment on Mars
Southwest Research Institute (SwRI) led the development of the Radiation Assessment Detector, which will measure, for the first time, the radiation environment on the surface of Mars, measuring all the relevant energetic particle species.Read More...
New NASA Missions to Investigate How Mars Turned Hostile
New NASA Missions to Investigate How Mars Turned Hostile
Two new NASA missions, one that will roam the surface and another that will orbit the planet and dip briefly into its upper atmosphere, will try to discover what transformed Mars.Read More...
Stellar Extremophiles
Stellar Extremophiles
Back in the 1970s, biologists were amazed to discover a form of life they never expected. Tiny microorganisms with ancient DNA were living in the hot springs of Yellowstone National Park ...Read More...
Strange Hollows Discovered on Mercury
Strange Hollows Discovered on Mercury
NASA's MESSENGER spacecraft has discovered strange hollows on the surface of Mercury.Read More...
The Strange Attraction of Gale Crater
The Strange Attraction of Gale Crater
It sounds a little odd -- a mountain in the middle of an impact crater.Read More...
Orbital Observations of Mercury Reveal Flood Lavas, Hollows, and Unprecedented Surface Details
Orbital Observations of Mercury Reveal Flood Lavas, Hollows, and Unprecedented Surface Details
After only six months in orbit around Mercury, NASA's MESSENGER spacecraft is sending back information that has revolutionized the way scientists think about the innermost planet.Read More...
Venus Weather Not Boring After All, NASA/International Study Shows
Venus Weather Not Boring After All, NASA/International Study Shows
At first glance, a weather forecaster for Venus would have either a really easy or a really boring job, depending on your point of view.Read More...
Help NASA Find Life On Mars With MAPPER
Help NASA Find Life On Mars With MAPPER
Would you like to participate in NASA's analog research program? Now you can with MAPPER.Read More...
NASA Plans to Visit a Near-Earth Asteroid
NASA Plans to Visit a Near-Earth Asteroid
In a few years a NASA spacecraft will seek the building blocks of life in a shovelful of asteroid dirt. The OSIRIS-REx spacecraft is targeted for launch in September 2016.Read More...
Spaceships, Meteors and Moonlight
Spaceships, Meteors and Moonlight
Bright moonlight streams through your window. A nugget of space debris disintegrates in a sparkling fireball. A huge spaceship glides silently overhead. Any one of these events might be enough to get you out of bed, but all three are going to happen.Read More...
NASA Researchers: DNA Building Blocks Can Be Made in Space
NASA Researchers: DNA Building Blocks Can Be Made in Space
NASA-funded researchers have evidence that some building blocks of DNA, the molecule that carries the genetic instructions for life, found in meteorites were likely created in space.Read More...
What Lies Inside Jupiter?
What Lies Inside Jupiter?
The goal of the Juno mission is to answer the question: " What lies inside Jupiter?"Read More...
Aerogels: Thinner, Lighter, Stronger
Aerogels: Thinner, Lighter, Stronger
Although aerogels were first invented in the 1930s, NASA's Glenn Research Center in Cleveland has invented groundbreaking methods of creating new types of aerogels that could change the way we think about insulation.Read More...
Does Asteroid Vesta Have a Moon?
Does Asteroid Vesta Have a Moon?
From now until Dawn goes into orbit about Vesta every picture of the giant asteroid will be the best one ever taken. What will researchers do with this unprecedented clarity? Look for an asteroid moon.Read More...
Join NASA in Measuring an Asteroid
Join NASA in Measuring an Asteroid
On July 3 at 11:05:30 p.m. EDT, 52 Europa will pass in front of star TYC 0292-00339-1. Here on Earth, astronomers can measure the exact length of time the star's light is blocked and use those calculations to help verify the size of 52 Europa.Read More...
The Long, Slow Clean-Up
The Long, Slow Clean-Up
The Genesis mission brought important new evidence to scientists working to understand how the solar system formed, but it also brought an unprecedented challenge.Read More...
One Step Closer to Earth's Genesis
One Step Closer to Earth's Genesis
Kevin McKeegan's announcement at the 2008 Lunar and Planetary Science Conference that the pattern of oxygen isotopes on the Sun differs greatly from that of Earth took many planetary scientists by surprise.Read More...
The Sun Under Lock and Key
The Sun Under Lock and Key
Where do you think you would find the world's most valuable collection? You can make an awfully good argument for the Astromaterials Curation Labs at Johnson Space Center. That is where NASA keeps the Genesis solar wind samples, and much more.Read More...
What Are Isotopes, and Why Should We Care?
What Are Isotopes, and Why Should We Care?
Your last drink of water contained isotopes that could help a Crime Scene Investigation unit determine where you've been living if they find a few strands of your hair.Read More...
The Big Question -- The Reason for the Genesis Mission
The Big Question -- The Reason for the Genesis Mission
Where did the world come from? An immense gas cloud, peppered with atoms made by stars, squeezed itself together so tightly that its center ignited into a nuclear furnace and became our sun. The remaining bits and pieces of the cloud, known as ...Read More...
ARTEMIS Spacecraft Prepare for Lunar Orbit
ARTEMIS Spacecraft Prepare for Lunar Orbit
They've almost arrived. It took one and a half years, over 90 orbit maneuvers, and -- wonderfully -- many gravitational boosts and only the barest bit of fuel to move two spacecraft from their orbit around Earth to their new home around the Moon.Read More...
MESSENGER Provides New Data about Mercury
MESSENGER Provides New Data about Mercury
After nearly three months in orbit about Mercury, MESSENGER's payload is providing a wealth of new information about the planet closest to the sun, as well as a few surprises.Read More...
A Big Surprise from the Edge of the Solar System
A Big Surprise from the Edge of the Solar System
Voyager mission scientists say the probes have just sent back some very big news indeed: It's bubbly out there.Read More...
Timeline of Martian Volcanism
Timeline of Martian Volcanism
The volcanoes on Mars, though inactive, stand as proof of past volcanic activity whose timing, duration and cessation are hot topics in planetary science.Read More...
Moon's Rough 'Wrinkles' Reveal Clues To Its Past
Moon's Rough 'Wrinkles' Reveal Clues To Its Past
Written on the moon's weary face are the damages it has endured for the past 4-1/2 billion years. But they only hint at the processes that once acted-and act today-to shape the surface.Read More...
Science Highlights from Mercury's Orbit
Science Highlights from Mercury's Orbit
As the first spacecraft to orbit the planet Mercury, MESSENGER has the opportunity to make many observations of the solar system's innermost planet that had not previously been possible.Read More...
Spiders in Space -- The Sequel!
Spiders in Space -- The Sequel!
The very idea of spiders in space brings to mind campy, black and white horror films involving eight-legged monsters. In actuality, it is a scientific investigation called Commercial Generic Bioprocessing Apparatus Science Insert-05.Read More...
Meteors from Halley's Comet
Meteors from Halley's Comet
Looking for an adventure? Get up in the wee hours of the morning May 6th and head out into the country, far from the city lights. You won't be alone. The birds will be up and singing about the coming dawn, and about the eta Aquarid meteor shower.Read More...
Solar Activity Heats Up
Solar Activity Heats Up
If you've ever stood in front of a hot stove, watching a pot of water and waiting impatiently for it to boil, you know what it feels like to be a solar physicist.Read More...
Dawn Approaches Asteroid Vesta
Dawn Approaches Asteroid Vesta
After 3 ½ years of thrusting silently through the void, NASA's Dawn spacecraft is on the threshold of a new world. It's deep in the asteroid belt, less than 4 months from giant asteroid Vesta.Read More...
Vesta -- Is it Really an Asteroid?
Vesta -- Is it Really an Asteroid?
As NASA's Dawn spacecraft closes in on Vesta, researchers are wondering if the behemoth space rock is just an asteroid--or something more?Read More...
Super Full Moon
Super Full Moon
On March 19th, a full Moon of rare size and beauty will rise in the east at sunset. It's a super "perigee moon"--the biggest in almost 20 years.Read More...
Finally! NASA Prepares to Orbit Mercury
Finally! NASA Prepares to Orbit Mercury
On March 17th, NASA's MESSENGER probe will become the first spacecraft to orbit Mercury. It's a seminal moment in planetary exploration. Researchers can finally take a good long look at a rocky world that is both akin to Earth and shockingly alien.Read More...
Can WISE Find the Hypothetical 'Tyche'?
Can WISE Find the Hypothetical 'Tyche'?
In November 2010, the scientific journal Icarus published a paper by astrophysicists John Matese and Daniel Whitmire, who proposed the existence of a binary companion to our sun, larger than Jupiter, in the long-hypothesized Oort cloud.Read More...
A Solar System Family Portrait, From the Inside Out
A Solar System Family Portrait, From the Inside Out
What would our solar system look like if visitors from other worlds took a series of pictures? NASA's MESSENGER spacecraft did just that by piecing together the first portrait of our solar system from the inside looking out.Read More...
The Two Faces of Tempel 1
The Two Faces of Tempel 1
Whichever part of comet Tempel 1 is facing toward Stardust when the spacecraft zips by the comet tonight should provide some great new science.Read More...
Five Things About NASA's Valentine's Day Comet
Five Things About NASA's Valentine's Day Comet
Here are five facts you should know about NASA's Stardust-NExT spacecraft as it prepares for a Valentine's "date" with comet Tempel 1. Feel free to sing along!Read More...
NASA Spacecraft Closes in on Comet Tempel 1
NASA Spacecraft Closes in on Comet Tempel 1
NASA is about to discover how solar heat devours a comet as the Stardust-NExT probe closes in for a Valentine's Day encounter with Tempel 1.Read More...
Who's Who at NASA: Dr. Jim Green, Director, Planetary Science Division, NASA Headquarters, Washington, DC
Who's Who at NASA: Dr. Jim Green, Director, Planetary Science Division, NASA Headquarters, Washington, DC
NASA Tech Briefs talks planetary science with Dr. James Green, the man in charge of NASA's robotic exploration of the planets, moons and bodies of our solar system.Read More...
A Fizzy Ocean on Enceladus
A Fizzy Ocean on Enceladus
Evidence is mounting that Saturn's moon Enceladus harbors a bubbly subterranean ocean where conditions might be friendly to life.Read More...
Sundiving Comet Storm
Sundiving Comet Storm
2010 ended with an unprecedented flurry of small comets diving into the sun. Researchers say this could herald a much larger comet still to come.Read More...
Asteroid Itokawa Sample Return
Asteroid Itokawa Sample Return
"It's an incredible feeling to have another world right in the palm of your hand," says Mike Zolensky, Associate Curator for Interplanetary Dust at Johnson Space Center. "We're seeing for the first time, up close, what an asteroid is actually made of!"Read More...
Geminid Meteor Shower Defies Explanation
Geminid Meteor Shower Defies Explanation
"The Geminids are my favorite," says NASA astronomer Bill Cooke, "because they defy explanation."

Most meteor showers come from comets, which spew ample meteoroids for a night of 'shooting stars.' The Geminids are different. The parent is notRead More...
The Sun Steals Comets from Other Stars
The Sun Steals Comets from Other Stars
The next time you thrill at the sight of a comet blazing across the night sky, consider this: it's a stolen pleasure. You're enjoying the spectacle at the expense of a distant star.Read More...
Dead Spacecraft Walking
Dead Spacecraft Walking
A pair of NASA spacecraft that were supposed to be dead a year ago are instead flying to the Moon for a breakthrough mission in lunar orbit.Read More...
NASA Spacecraft Hurtles Toward Active Comet Hartley 2
NASA Spacecraft Hurtles Toward Active Comet Hartley 2
NASA's Deep Impact/EPOXI spacecraft is hurtling toward Comet Hartley 2 for a breathtaking 435-mile flyby on Nov. 4th.Read More...
Aftermath of Possible Asteroid Collision
Aftermath of Possible Asteroid Collision
NASA's Hubble Space Telescope has captured rare images of a suspected asteroid collision. The snapshots show a bizarre X-shaped object at the head of a comet-like trail of material.Read More...
Saturn's Tiny Moon May Keep its Oceans Liquid by Wobbling
Saturn's Tiny Moon May Keep its Oceans Liquid by Wobbling
Saturn's icy moon Enceladus should not be one of the most promising places in our solar system to look for extraterrestrial life. But NASA's Cassini orbiter has found promising signs of liquid oceans -- a key ingredient for life.Read More...
The Year of the Solar System
The Year of the Solar System
To mark an unprecedented flurry of exploration which is about to begin, NASA announced today that the coming year will be "The Year of the Solar System"Read More...
Discovery of the Moon's Mysterious Mascons
Discovery of the Moon's Mysterious Mascons
While movie audiences watched scientists uncover a mystery on the Moon in 2001: A Space Odyssey, a strangely parallel story was unfolding in real life. And the first human missions to the Moon were at stake.Read More...
Raisin Mountains on Saturn's Moon Titan
Raisin Mountains on Saturn's Moon Titan
Saturn's moon Titan ripples with mountains, and scientists have been trying to figure out how they form. The best explanation, it turns out, is that Titan is shrinking as it cools, wrinkling up the moon's surface like a raisin.Read More...
Spacequakes Rumble Near Earth
Spacequakes Rumble Near Earth
Researchers using NASA's fleet of five THEMIS spacecraft have discovered a form of space weather that packs the punch of an earthquake and plays a key role in sparking bright Northern Lights. They call it "the spacequake."Read More...
Interplanetary Playlist
Interplanetary Playlist
NASA has a long tradition of wakeup calls to rouse both human and robotic explorers. The selections range from Barbara Streisand's Hello Dolly to Led Zepplin's Dazed and Confused.Read More...
2012: Doom or Hype?
2012: Doom or Hype?
The short answer? Hype. Contrary to some of the common beliefs out there, the science behind the end of the world quickly unravels when pinned down to the 2012 timeline.Read More...
Halfway to Pluto
Halfway to Pluto
Halfway to Pluto, NASA's New Horizons probe has woken up in 'exotic territory.' Mission controllers are taking the opportunity to give the spacecraft a thorough system's check in preparation for its Pluto flyby in 2015.Read More...
Strange Martian Spirals Explained
Strange Martian Spirals Explained
Using new data from the Mars Reconnaissance Orbiter, researchers have finally uncovered the secrets of the mysterious troughs that snake through the Martian ice cap like a spiraled maze.Read More...
Jupiter Impact: Mystery of the Missing Debris
Jupiter Impact: Mystery of the Missing Debris
We've seen things hit Jupiter before and the flash of impact has always been followed by some kind of debris. But not this time.Read More...
Old Rover, New Tricks
Old Rover, New Tricks
3 June 2010:: A Soviet robot lost on the dusty plains of the Moon for the past 40 years has been found again, and it is returning surprisingly strong laser pulses to Earth.Read More...
Jupiter Loses a Stripe
Jupiter Loses a Stripe
In a surprising development that has transformed the appearance of the solar system's largest planet, one of Jupiter's two main cloud belts has completely disappeared.Read More...
Hidden Galaxy Revealed
Hidden Galaxy Revealed
April 2010: NASA's Wide-field Infrared Survey Explorer (WISE) reveals a hidden galaxy, called IC 342. This galaxy was shrouded from view by our own galaxy.Read More...
A Better Look at Icy Surfaces
A Better Look at Icy Surfaces
New lab studies are increasing our understanding of how well current models can detect organics on icy bodies.Read More...
What is a Planet?
What is a Planet?
Our understanding about the universe and our place in it has changed over time. New information can cause us to rethink what we know and reevaluate how we classify objects in order to better understand them.Read More...
Voyager Makes an Interstellar Discovery
Voyager Makes an Interstellar Discovery
The solar system is passing through an interstellar cloud that physics says should not exist. In the Dec. 24th issue of Nature, a team of scientists reveal how NASA's Voyager spacecraft have solved the mystery.Read More...
Sandtrapped Rover Makes a Big Discovery
Sandtrapped Rover Makes a Big Discovery
Despite being stuck, Mars Exporation Rover Spirit has made intriguing discoveries simply by spinning its wheels in deep sand.Read More...
Water on the Moon
Water on the Moon
The argument that the Moon is a dry, desolate place no longer holds water. Preliminary data from NASA's indicates water existis in a permanently shadowed crater on the Moon.Read More...
Lunar LADEE
Lunar LADEE
Scientists want to take advantage of a quiet spell to study the Moon's thin atmosphere before the planned increase in human activity.Read More...
Daylight Saving Time
Daylight Saving Time
Spring forward. Fall back. The basic idea of Daylight Saving Time is to make the best use of daylight by shifting the clock.Read More...
Giant Ribbon Discovered at the Edge of the Solar System
Giant Ribbon Discovered at the Edge of the Solar System
NASA's IBEX spacecraft has made the first all-sky maps of the heliosphere and the results have taken researchers by surprise. The maps are bisected by a bright, winding ribbon of unknown origin.Read More...
Galileo on Galileo, Part II
Galileo on Galileo, Part II
What would Galileo think of the discoveries made by the spacecraft that carried his name to Jupiter? In honor of the 20th anniversary of the spacecraft's launch, Galileo science team members imagine a look back through the eyes of Galileo.Read More...
Galileo on Galileo, Part I
Galileo on Galileo, Part I
What would Galileo think of the discoveries made by the spacecraft that carried his name to Jupiter? As the spacecraft approached Jupiter In 1995, members of the Galileo science team imagined a look back through the eyes of Galileo.Read More...
Juno Mission to Jupiter:  Unlocking the Secrets of a Giant Planet
Juno Mission to Jupiter: Unlocking the Secrets of a Giant Planet
NASA's Juno mission is preparing to embark on a mission to unlock the secrets of our solar system's largest planet.Read More...
Just For Fun
Just For Fun
These hands-on activities are so entertaining, kids won't even know they're learning.Read More...
LRO and LCROSS:  Leading the Quest to Find Water on the Moon
LRO and LCROSS: Leading the Quest to Find Water on the Moon
Two new spacecraft are carrying the most sophisticated instruments to date to the hunt for water ice on the Moon.Read More...
Active Mercury
Active Mercury
A NASA spacecraft gliding over the surface of Mercury has revealed that the planet's atmosphere, magnetosphere, and its geological past display greater levels of activity than scientists first suspected.Read More...
Galaxies and the Distant Universe
Galaxies and the Distant Universe
This month's International Year of Astronomy activities go wide with a look at galaxies, including our own.Read More...
Lunar GRAIL
Lunar GRAIL
GRAIL is a future NASA mission that will probe the moon's gravity field.Read More...
Explore The Sky: Night & Day
Explore The Sky: Night & Day
In March, the celebration of the 2009 International Year of Astronomy continues with observing the sky by night and by day. Now is the perfect time to get outside and observe our celestial neighbors.Read More...
The Kepler Telescope
The Kepler Telescope
The Kepler Telescope, set to launch no earlier than March 6, 2009, will be the very first mission capable of finding Earth-sized planets within our own galaxy.Read More...
Surprising Saturn
Surprising Saturn
Our solar system's ringed giant has been a consistent source of surprises for 400 years.Read More...
Our Solar System: Galileo's Observations of the Moon, Jupiter, Venus and the Sun
Our Solar System: Galileo's Observations of the Moon, Jupiter, Venus and the Sun
February 15th marked the 445th birthday of Galileo Galilei, whose observations of our solar system and the Milky Way revolutionized our understanding of our place in the Universe.Read More...
Titan Saturn System Mission Backgrounder
Titan Saturn System Mission Backgrounder
Learn more about Saturn's intriguing moon Titan and past and future efforts to explore it with robotic spacecraft.Read More...
Hot on the Trail of Cold Volcanoes
Hot on the Trail of Cold Volcanoes
The Cassini spacecraft is revealing even more intriguing evidence for icy volcanoes on Titan through its radar-mapping instrument.Read More...
Europa Jupiter System Mission Backgrounder
Europa Jupiter System Mission Backgrounder
Learn more about Jupiter's intriguing moon Europa and past and future efforts to explore it with robotic spacecraft.Read More...
Titan:  Frozen in Time or Constantly Evolving?
Titan: Frozen in Time or Constantly Evolving?
Once thought to be frozen in time, new evidence hints that Saturn's giant moon Titan remains geologically active.Read More...
Gateway to the Solar System
Gateway to the Solar System
Earth's Moon has remained one of the most fascinating objects in our solar system for centuries.Read More...
Our Planetary Neighborhood
Our Planetary Neighborhood
Our solar system continues to deliver surprises 400 years after Galileo Galilei used his telescope to get the basics sorted out.Read More...
Venus Revealed
Venus Revealed
For a planet named in honor of mythology's ultimate supermodel, Venus sure is camera shy.Read More...
Tracking Global Climate Change: NASA's New Jason-2
Tracking Global Climate Change: NASA's New Jason-2
Launched into Earth orbit June 20, 2008, OSTM/Jason-2 is producing information and maps that are already helping scientists to track and understand how and where our oceans are warming, and how our global climate may change.Read More...
Hydrologic Cycles On Earth And On Titan :  A Comparable Paradigm
Hydrologic Cycles On Earth And On Titan : A Comparable Paradigm
Studying climate-related processes on Titan can help scientists understand and predict changes in Earth's hydrological cycle.Read More...
Cassini Equinox Mission
Cassini Equinox Mission
With NASA's Cassini prime mission concluded, the Cassini Equinox Mission begins.Read More...
It's a Moon Thing
It's a Moon Thing
There is a shift in the way scientists are studying these outer planetary systems -- by targeting specifically their unique and mysterious moons.Read More...
Magnetospheres:  Plasma of the Solar System
Magnetospheres: Plasma of the Solar System
We often hear about magnetic fields on Earth as well as surrounding other planets. Also known as magnetospheres, what exactly are they and how do they affect our universe?Read More...
The Charged Particle Environment of Titan
The Charged Particle Environment of Titan
Since planetary magnetospheres throughout the solar system are composed of highly charged ions and electrons, it is natural to be intrigued by the effects of that magnetosphere on the planet's satellites, such as those on Saturn's largest moon Titan.Read More...
Taking Another Look at Europa
Taking Another Look at Europa
New research and enhanced remote sensing techniques are bringing scientists closer to being able to explore Europa's tantalizing ice-covered ocean and determine its potential for harboring life.Read More...
Hyperion:  Return of the Sponge Moon
Hyperion: Return of the Sponge Moon
Since its discovery, Hyperion had been distinguished only by its irregular shape and chaotic rotation.Read More...
The Enigma of Iapetus:
The Enigma of Iapetus: "The Moon with a View"
The mysterious moon, with a walnut-shaped appearance due to its equatorial mountain ridge and brightness contrast have intrigued scientists for decades, and holds possible keys to the ancient chemical origins of the solar system.Read More...
Enceladus' Stressed out Tiger Stripes
Enceladus' Stressed out Tiger Stripes
Enceladus may contain enough interior friction to heat ice, creating huge geysers. That liquid water makes Enceladus a promising place to look for extraterrestrial life.Read More...
Life Under the Ice?
Life Under the Ice?
Move over, Mars. Jupiter's moon, Europa, may be the most promising site for extraterrestrial life in our solar system.Read More...
The Clues to What Lies Beneath
The Clues to What Lies Beneath
Considering that not a single instrument has landed on Europa, it's remarkable how much scientists have discovered about what lies under its icy surface.Read More...
International Polar Year on Earth and Beyond
International Polar Year on Earth and Beyond
The International Polar Year is an international effort to focus attention on the Earth's polar regions.Read More...
The Asteroids and Comets They Are A-Changin'
The Asteroids and Comets They Are A-Changin'
It wasn't so long ago that Comets were comets and asteroids were asteroids. Things were simple - life was good. No longer!Read More...
Jupiter's Magnetosphere: The Largest in Our Solar System
Jupiter's Magnetosphere: The Largest in Our Solar System
A magnetosphere is the region of space surrounding a planet, which is dominated by its magnetic field rather than the solar wind.Read More...
Saturn's Largest Sphere
Saturn's Largest Sphere
The outer planets are much more than large gaseous planets. They are highly complex systems of interacting components. However, most would not recognize the largest, yet mostly invisible part of Saturn's system, its magnetosphere.Read More...
The Mountains of Saturn's Mysterious Moon Iapetus<BR><BR>
The Mountains of Saturn's Mysterious Moon Iapetus


Observations from the Cassini spacecraft have found an Iapetus mystery.Read More...
Tohil Mons: The Ionian Mountain that Defies its Very Existence
Tohil Mons: The Ionian Mountain that Defies its Very Existence
A mysterious mountain peak named Tohil Mons - a mountain that shouldn't exist.Read More...
Discovering Mercury: The 2006 Transit
Discovering Mercury: The 2006 Transit
Mercury provides clues to the formation of the solar system.Read More...
Remembering Katrina - Learning and Predicting the Future
Remembering Katrina - Learning and Predicting the Future
Many valuable lessons are learned from last years devastating hurricane.Read More...
Birthplace of Hurricanes
Birthplace of Hurricanes
Learning the details of storm formation.Read More...
Volcanism on Io
Volcanism on Io
Io exhibits volcanic activity on a global scale.Read More...
Ice In An Unlikely Place: Mercury
Ice In An Unlikely Place: Mercury
Evidence for ice on Mercury from Earth-based RADAR imaging.Read More...
Europa: Searching For the Ocean Deep
Europa: Searching For the Ocean Deep
The search for life in our solar system continues.Read More...
Moonquakes: Understanding our Seismically-Active Neighbor
Deserts: Abundant Discoveries Despite Desolation
Deserts: Abundant Discoveries Despite Desolation
Deserts exist in all parts of the solar system. Some examples can be found on Mercury, Venus, Earth, our Moon, Mars, and the asteroid belt.Read More...
Get Involved with Stardust
Get Involved with Stardust
Internet users can help search for dust grains in Stardust's aerogel.Read More...
How to Bring a Comet Home
How to Bring a Comet Home
The Stardust spacecraft finally returned to Earth with some precious cargo.Read More...
Observing Stardust's Sample Return to Earth
Observing Stardust's Sample Return to Earth
NASA's Stardust Sample Return Capsule and Entry Path Visible in NorthwestRead More...
Beware the Mars Hoax
Beware the Mars Hoax
Earth and Mars are converging for a close encounter--but not as close as some people think.Read More...
Weather, Weather, Everywhere?
Weather, Weather, Everywhere?
The seasons that occur on other planets are extremely different from the traditional weather that we experience here on Earth.Read More...
Explosive Volcanic Eruptions on the Moon
Explosive Volcanic Eruptions on the Moon
Dark Mantle Deposits would be ideal locations for future human colonies on the Moon.Read More...
Dirty Ice on Mars
Dirty Ice on Mars
Instruments on the Odyssey spacecraft show that a lot of dirty ice sits within a meter of the surface in the south polar latitudes of Mars.Read More...
Night of the Two Moons
Night of the Two Moons
Separated by more than a billion miles, Saturn's mysterious Titan and Earth's moon came together for a night in October.Read More...
Titan's Surface Revealed
Titan's Surface Revealed
Piercing the smog enshrouding Titan, new images from Cassini reveal an exotic surface covered with a variety of materials.Read More...
Blue Moon Rising
Blue Moon Rising
July 2004 has two full moons, which means one of them is a Blue Moon. But will it really be blue? Believe it or not, scientists say blue-colored moons are real.Read More...
James Cook and the Transit of Venus
James Cook and the Transit of Venus
The best reason to watch the transit of Venus on June 8, 2004 is history.Read More...
Jupiter: Mythology and Man's Early Musings
Jupiter: Mythology and Man's Early Musings
Modern science has somewhat demystified Jupiter, but our fascination with this giant world dates back thousands of years.Read More...
Was Galileo Wrong?
Was Galileo Wrong?
Could a fundamental assumptions of modern physics be wrong? Scientists are going to find out by bouncing laser beams off the Moon.Read More...
Phases of the Moon
Phases of the Moon
What is the relationship between the phase of the Moon and the time it rises or sets? Can you see a crescent at midnight? For how many hours will a full Moon be visible?Read More...
Europa's Salty Surface
Europa's Salty Surface
Pictures of Jupiter's moon Europa taken by the Galileo spacecraft during the past couple of years have suggested to scientists that there is now, or was in the past, an ocean beneath the satellite's frozen crust.Read More...
Big Mountain, Big Landslide on Jupiter's Moon, Io
Big Mountain, Big Landslide on Jupiter's Moon, Io
Caught in a tug of war between the gravitational fields of Jupiter and the next moon out (Europa), Io is heated incessantly by tidal stresses.Read More...
Origin of the Earth and Moon
Origin of the Earth and Moon
The formation of the planets was a violent process.Read More...
Uranus, Neptune, and the Mountains of the Moon
Uranus, Neptune, and the Mountains of the Moon
The tardy formation of Uranus and Neptune might have caused the intense bombardment of the Moon 3.9 billion years ago.Read More...
New Data, New Ideas, and Lively Debate about Mercury
New Data, New Ideas, and Lively Debate about Mercury
A hundred scientists gathered to share new data and ideas about the important little planet closest to the Sun.Read More...
The Missing Moon of Sedna
The Missing Moon of Sedna
Astronomers examining Hubble Space Telescope imagesRead More...
Mercury Unveiled
Mercury Unveiled
Mercury, the second smallest planet and the closest one to the Sun, may appear to some as a drab, colorless, heavily-cratered world. Not so.Read More...
Damage by Impact -- the Case at Meteor Crater, Arizona
Damage by Impact -- the Case at Meteor Crater, Arizona
Just how often does a devistating impact event occur on Earth? We'll examine the potential hazards.Read More...
INSPIRE
INSPIRE
INSPIRE is a non-profit scientific, educational organization whose objective is to bring the excitement of observing natural and manmade radio waves in the audio region to high school students and others.Read More...
What is the Electromagnetic Spectrum? What is Infrared? How was the Infrared Discovered?
What is the Electromagnetic Spectrum? What is Infrared? How was the Infrared Discovered?
Light (or radiation) is made up of vibrating waves of electrical and magnetic fields.Read More...
Measuring Temperature Reading
Measuring Temperature Reading
Measuring length is far simpler than measuring temperature.Read More...
Rules for Identifying Ancient Life
Rules for Identifying Ancient Life
J. William Schopf (University of California, Los Angeles) has spent many years examining ancient rocks on Earth to identify the oldest fossils.Read More...
Europa and Titan: Oceans in the Outer Solar System?
Europa and Titan: Oceans in the Outer Solar System?
Europa and Titan are the best possible candidate locations for life in the outer Solar System.Read More...
Searching Antarctic Ice for Meteorites
Searching Antarctic Ice for Meteorites
Silver anniversary season: The vigorous life and times of the ANSMET team at Meteorite Hills resulted in a new set of 336 meteorites collected off the ice.Read More...
Ring Around the Black Hole
Ring Around the Black Hole
New observations are shedding light on how black holes acquire mass.Read More...
A Polarized Universe
A Polarized Universe
Our universe is so cool you gotta wear polarized shades.Read More...
How to Build a Supermassive Black Hole
How to Build a Supermassive Black Hole
Recent Chandra observations suggest that monster black holes form from the merger of their smaller brethren.Read More...
Fun Times with Cosmic Rays
Fun Times with Cosmic Rays
Who would have thought cosmic rays could be so hip?Read More...
The Gamma-Ray Burst Next Door
The Gamma-Ray Burst Next Door
New evidence suggests that life-threatening explosions are closer than we thought.Read More...
Journey to the Center of a Neutron Star
Journey to the Center of a Neutron Star
Astronomers are using whatever means possible to probe the ultradense interiors of neutron stars.Read More...
Mapping the Baby Universe
Mapping the Baby Universe
NASA's MAP mission will map the cosmic microwave background in unprecedented detail.Read More...
More Hidden Black Hole Dangers
More Hidden Black Hole Dangers
Satellite observations now strongly suggest that black holes spin and pull space along for the ride.Read More...
Apparition of Comet Hale-Bopp
Apparition of Comet Hale-Bopp
In an era where the celestial realm was the realm of the gods, the sudden appearance of an unknown object which dominated the night sky was terrifying.Read More...
The Center of the Galaxy
The Center of the Galaxy
For centuries it was believed that the Earth was the center of the universe.Read More...
Baby Stars in Orion Solve Solar System Mystery
Baby Stars in Orion Solve Solar System Mystery
Hyperactive young stars in the Orion Nebula may help explain exotic isotopes in the solar system.Read More...
The First Rock in the Solar System
The First Rock in the Solar System
An aggregate of corundum, hibonite, and perovskite may be among the first rocks to form in the Solar System.Read More...
Uncharted Meteors
Uncharted Meteors
The solar system is littered with clouds of dust--some of them uncharted. Earth might encounter one someday.Read More...
An Untold Rock Story
An Untold Rock Story
A shiny gray rock called hematite may help tell the story of past water on Mars. Mars Rover Opportunity is exploring a hematite-rich region of the Red Planet.Read More...
Maximum Impact
Maximum Impact
Sometimes asteroids and comets punch holes in planets - also called craters.Read More...
Infrared: Catch the Wave
Infrared: Catch the Wave
Scientists and couch potatoes agree: Infrared is hot.Read More...
New Spin on Asteroids<BR><BR>
New Spin on Asteroids


What makes some asteroids spin in sync? Surprisingly, it's sunlight.Read More...
In Search of Moon Trees
In Search of Moon Trees
Hundreds of trees have been to the Moon. How they got there and back again is a curious tale.Read More...
Sixty-Five Amazing Galileo Facts
Sixty-Five Amazing Galileo Facts
The Galileo mission team produced this list of facts about their mission to Jupiter back in 1996. They are presented here as a historical record of an amazing, historic mission and have not been updated.Read More...
Music of the Spheres
Music of the Spheres
The Galileo team has an honorable tradition of commemorating important mission events by writing songs about them. For starters, here are a few numbers that were written for a recent outer planets lunchtime event.Read More...
Io: A Volcanic Puzzle
Io: A Volcanic Puzzle
Io is covered with hundreds of volcanic craters which continually spew forth fresh material, resurfacing the entire moon every century.Read More...
Playing Cosmic Billiards
Playing Cosmic Billiards
One of the first things taught in geometry is that the shortest distance between two points is a straight line. But in the case of the Galileo mission to Jupiter, the most efficient path is a six-year journey that initially headed toward Venus.Read More...
 
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Last Updated: 29 Jul 2014