Meteorites may hold new clues about the supernova explosions from which the stars and planets of our solar system formed, new research shows.
Learn more about NASA's New Horizons mission, which performed history's first flyby of the Pluto system on July 14, 2015.
In its first hundred million years, Mars could have started off close to Venus, before gravitational interactions moved it out to its present position.
With books about space and science intended for a young audience, there is a fine line between writing that's too complex and writing that older kids might write off as "babyish."
New images from the Hubble Space Telescope show Saturn's ultraviolet auroras swirling at the planet's north pole in the months before and after the northern summer solstice.
The New Horizons spacecraft is on its way to a distant solar system object and has spotted its destination — on its first try and from more than 100 million miles (170 million kilometers) away.
New research suggests why Jupiter, the largest planet in the solar system, waited about two million years for its early-formation growth spurt.
An awe-inspiring photo provides a breathtaking new view of Saturn's icy rings, showing that the iconic features are translucent.
"Ask a Spaceman" is live for the first time on Facebook — and astrophysicist Paul Sutter jumps right into it with a trip to Pluto.
Water and liquid rubies may exist within the nightside clouds of distant Jupiter-like exoplanets, but they melt in the heat of the planets' scorchingly hot bright sides, according to NASA.
There's a vast "hydrogen wall" at the edge of our solar system, and NASA scientists think their New Horizons spacecraft can see it.
Learn all about NASA's Parker Solar Probe mission, which the agency aims to launch in July 2018. The spacecraft will get seven times closer to the sun than any probe ever has before.
Callisto is thought to be a long dead world, with hardly any geologic activity on its surface. But an ocean may lie underground.
If you regard comets as big old dirty snowballs, boringly uniform and featureless, this photo will set you straight.
Nearly a half century after astronauts first visited the moon, it is once again a flash point for debates on how to safely, responsibly explore the solar system.
The handlers of NASA's New Horizons spacecraft are gearing up for one last shadow-chasing adventure.
Early this morning, Mars made its closest approach to Earth since 2003 — but if you missed it, the Red Planet is still a magnificent sight to see in the sky.
Ancient and rare blue crystals from the dawn of the solar system help confirm that the newborn sun was violently active, a new study reports.