Looking for a sky event this week? Check out our full Sky This Week column. January 20: Comet Schaumasse slides by some ...

The solar system's largest moon, Ganymede, which orbits the largest planet, Jupiter, was hit by an asteroid four billion years ago that shifted the gas giant's satellite on its axis, new research ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: NASA/JPL-Caltech/SwRI/MSSS/Kalleheikki Kannisto A ...

Looking for a sky event this week? Check out our full Sky This Week column. January 12: Io's post-opposition transit Point ...

A new discovery suggests the possibility of an exomoon with an unprecedentedly large mass, thousands of times larger than any ...

Sky This Week is brought to you in part by Celestron. Friday, January 9Mars is in conjunction with the Sun at 7 A.M. EST, invisible in our sky until mid-March. The bright moon Titan lies near its ...

NASA’s Juno spacecraft flew closer to Jupiter’s moon Ganymede than any spacecraft in the last two decades, according to NASA. The moon is the largest in our solar system. (FILE-A screenshot from the ...

The largest moon in our solar system may have been knocked off its axis and cracked like an egg four billion years ago by an asteroid bigger than the one that wiped out the dinosaurs on Earth at the ...