The moon — for all its silent loveliness — was born in violence. About 4.5 billion years ago, a planet-sized object rammed the Earth and reduced it to a bleeding molten gob of starstuff, leaking like ...

Our natural satellite, the moon, has been orbiting Earth for about 4.5 billion years and has a synchronous rotation that influences the tides. Recent observations found that it is slowly drifting away ...

The Saturn moons Mimas and Pandora remind us of how different they are when they appear together, as in this image taken by Nasa's Cassini spacecraft. At just 81km across, Pandora's small size means ...