The Space Launch System and Orion capsule were transported to the launchpad before an astronaut mission that could launch as ...

Far from the Sun’s heat, orbiting the outer planets of the solar system, are moons with oceans of liquid water beneath their frozen surfaces. Keith Cooper finds out how planetary scientists are ...

This year, astronomers discovered more than 100 previously unknown moons in our own solar system. There may be many more yet to be discovered, and cataloguing them could help us better understand how ...

Many icy moons in the outer solar system are believed to harbor vast subsurface oceans sandwiched between thick ice shells and rocky cores. Since 2008, the methane-shrouded moon Titan has been thought ...

Among the solar system’s hundreds of known moons, few are as enticing as the handful that scientists believe have a global ocean lurking below their crusty surface. But two of these hidden oceans may ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...

After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar system—and it's an absolute giant. Reading time 3 minutes In September, NASA ...

Several small worlds beyond Jupiter are not just frozen rubble. Beneath their shining skins, many hide oceans of liquid water. New research says those seas do not always stay calm. When the ice lids ...

"Life could go on as usual." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Small icy moons in the outer reaches of our solar system may hide ...

Saturn's moon Mimas, just 250 miles wide, could have a liquid water ocean under its outer icy shell, according to new research led by Max Rudolph at UC Davis. If such moons are the right size, water ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of Earth’s mantle and ejecting a huge debris disk that later formed the moon.

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon, came from closer to the sun. Artist’s impression of the collision between ...