Astronomers witnessed planets colliding 11,000 light-years away, an event that could shed light on the collision that created Earth's moon.

Our moon is a particularly unusual example of moons when it comes to planetary bodies. Though many other planets in the solar system have moons, they are very different from our own. Most planets have ...

The collision bears a striking resemblance to the one thought to have created the Earth and Moon about 4.5 billion years ago.

Astronomers have uncovered evidence of a spectacular collision of two planets within the confines of a faraway solar system, providing us with a rare chance to observe firsthand the extremes of ...