Solar System Exploration
September 17, 2004
This colorized flyover movie from NASA's Cassini mission takes viewers over the two largest seas on Saturn's moon Titan and nearby lakes.
Flying over an Extraterrestrial Land of Lakes
December 2, 2020, marked the 25th anniversary of the Solar and Heliospheric Observatory, or SOHO – a joint mission of the European Space Agency and NASA. Since its launch on that date, the mission ...
Decades of Sun from SOHO
Mark Hofstadter describes the lure of science -- of discovering something new -- and his path to becoming a planetary scientist.
Through the Eyes of Scientists - Meet Mark Hofstadter
Cassini mission leads Earl Maize and Linda Spilker talked about the spacecraft's epic journey and science - and the exciting two-part grand finale.
Revealing Saturn: Cassini's Grand Finale (Video)
Probe Landing on Titan
Probe Landing on Titan
Hello from Saturn, essentially on the opposite side of the sun as seen from Earth! This annual occurrence called solar conjunction, when Saturn (and Cassini) nearly disappear behind the sun.
What's Up? Solar Conjunction
The Usual Suspects: Science research is like detective work. One scientist takes his case to California's Death Valley, to search for clues surrounding a Titan lake.
The Usual Suspects
Clara, Sugar Plum Fairy, move aside. Saturn's moons give Tchaikovsky's classic ballet, "The Nutcracker," a graceful new spin in this video compiled from some 61 images taken by the Cassini spacecra...
Saturn Moon Ballet
Striking 3-D detail highlights a towering mountain, the brightest spots and other features on dwarf planet Ceres in a new video from NASA's Dawn mission.
Tour Weird Ceres: Bright Spots and a Pyramid-Shaped Mountain
A quick look at how a Bistatic Observation works.
Bouncing Waves Off Titan
The Dawn spacecraft visited the asteroid 4 Vesta for the time period May 3, 2011 to Sept. 5, 2012.
Dawn's Approach to Vesta
What's Up for January? Morning meteors, Mars meets its "rival," and the Moon comes around for another visit with Venus.
What's Up: January 2020 [Video]
Dawn spacecraft successfully launched September 27th, 2007.
NASA's Dawn Spacecraft Launches September 27, 2007
On October 15, 1997, the Cassini–Huygens spacecraft was launched on an almost 7-year journey to the Saturn system.
The heavens often seem vast and unchanging as seen from Earth, but movement in the skies is the norm. The relative motions of both Cassini and Enceladus over a 15-minute period create the movement ...
Nevertheless, It Moves
On Nov. 30, 2016, NASA's Cassini mission begins a daring set of ring-grazing orbits, skimming past the outside edge of Saturn's main rings.
Cassini's High-Flying, Ring-Grazing Orbits
A simplified visualization of Saturn's magnetic field, or magnetosphere.
Saturn's Magnetic Field (Magnetosphere)
Learn more about black holes, how to find them and how to stay safe should you ever get a chance to visit one.
Guide To Black Hole Safety
The geocentric phase, libration, position angle of the axis, and apparent diameter of the Moon throughout the year 2020.
Moon Phase and Libration, 2020
Sungrazing comets are a special class of comets that come very close to the sun at their nearest approach, a point called perihelion.
What is a Sun-Grazing Comet?
NASA’s Ingenuity Mars Helicopter successfully completed a second, more challenging flight on the Red Planet on April 22, 2021.
Second Flight a Success for NASA's Ingenuity Mars Helicopter
What's Up for November? Mercury transits across the Sun, and the dimming of the "Demon star," Algol.
What's Up: November 2019 [Video]
See all the planets, plus mission updates from comet and asteroid missions Dawn and Rosetta.
Whats Up? February 3, 2014
Filters, pixels and math star in this narrated cartoon.
How Does a Spacecraft Take a Picture?
NASA's Cassini spacecraft, in orbit around Saturn for nearly 13 years, is beginning its Grand Finale — and it's thanks to some Crazy Engineering! A team of engineers called astrodynamicists use ma...
Crazy Engineering: Astrodynamics
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The Perseids are already showing up in our night skies, and they peak in mid-August.
The Perseids are on the Rise!
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Hubble Spots Squabbling Galactic Siblings
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Three studies have cast doubt on the premise of subsurface lakes below the Martian south pole.
Clays, Not Water, Are Likely Source of Mars ‘Lakes'
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Index Ranks Rainforests' Vulnerability to Climate and Human Impacts