The team still can't confidently rule out the existence of Europa's water vapor, especially as similar plumes have been more ...

Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in on Saturn and Mars Tonight we're ...

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, ...

See dazzling planets, the Milky Way and a trio of celestial animals brightening the spring sky around May's new moon.

The prospects of tall, vapory plumes of water gracing Europa's surface caused a huge splash in astronomy—but the very ...

Jupiter’s moon Ganymede is already famous for being the largest moon in the solar system. At more than 3,200 miles wide, it ...