The smashups are thought to have occurred at least 100 million years ago, but the moons they created are new to astronomers.

The sheer number of objects suggests scientists will soon have to grapple with what counts as a moon versus what’s just a ...

The discovery points to what astronomers have thought for decades, that Saturn's rings were caused by a massive collision ...

Beijing deployed a naval task group to the waters around Australia for three related reasons. First, to demonstrate the reach ...