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Our Galactic Neighborhood
The words solar system refer to the sun and all of the objects that travel around it - planets, natural satellites such as the moon, the asteroid belt, comets and meteoroids. Our solar system is part of a spiral galaxy known as the Milky Way. The sun, the center of our solar system, holds eight planets and countless smaller objects in its orbit.

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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...
Planetary Seasons
Planetary Seasons
Planetary seasons are caused by two factors: axial tilt and variable distance from the sun (orbital eccentricity).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...
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...
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...
Solar System Exploration @ 50: What the Experts Picked
Research... at a Glance
Solar System Exploration @ 50: What the Experts Picked
Here is what the experts had to say about their favorite moments last 50 years of planetary robotic exploration.Read More...
Probing the Dark Sector with Euclid
Probing the Dark Sector with Euclid
Dr. Jason Rhodes explains in this lecture the basics of weak lensing and outline some key weak lensing results. He also discusses the European Space Agency's Euclid mission.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...
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...
Organics Probably Formed Easily in Early Solar System
Organics Probably Formed Easily in Early Solar System
Complex organic compounds, including many important to life on Earth, were readily produced under conditions that likely prevailed in the primordial solar system.Read More...
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Previous
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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...
Planetary Seasons
Planetary Seasons
Planetary seasons are caused by two factors: axial tilt and variable distance from the sun (orbital eccentricity).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...
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...
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...
Solar System Exploration @ 50: What the Experts Picked
Research... at a Glance
Solar System Exploration @ 50: What the Experts Picked
Here is what the experts had to say about their favorite moments last 50 years of planetary robotic exploration.Read More...
Probing the Dark Sector with Euclid
Probing the Dark Sector with Euclid
Dr. Jason Rhodes explains in this lecture the basics of weak lensing and outline some key weak lensing results. He also discusses the European Space Agency's Euclid mission.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...
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...
Organics Probably Formed Easily in Early Solar System
Organics Probably Formed Easily in Early Solar System
Complex organic compounds, including many important to life on Earth, were readily produced under conditions that likely prevailed in the primordial solar system.Read More...
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