About 4.5 billion years ago, a Mars-sized object, named Theia, slammed into a proto-Earth to create the Moon.

Add Yahoo as a preferred source to see more of our stories on Google. This view was taken from above the ringplane and looks toward the unlit side of the rings. Here, the probe gazes upon Titan in the ...

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed Theia slammed and merged with the primordial Earth, throwing material into ...

When worlds collide…suns act squirrely. Astronomers have witnessed a rare and violent cosmic crash between two planets, and they say the fallout could teach us about the formation of our world. The ...

Whether it’s under the stars on the Main Green, from smudged dorm windows or through open sunroofs, we see the moon nearly every night. But a new study by Brown researchers suggests that we know less ...

The moon is Earth's only natural satellite, a rocky celestial body that orbits our planet at an average distance of about 384 ...

February 11, 2026, Mountain View, CA – Recent research suggests that Saturn’s bright rings and its largest moon, Titan, may have both originated in collisions among its moons. While Cassini’s 13-year ...

Jupiter and Saturn may seem similar as gas giants, yet their vastly different moon systems reveal a deeper story shaped by ...

A new study reveals lunar ice formed over billions of years through shifting shadows, solar wind, and repeated impacts, ...