SpacePluto's evaporating ice leaves it with a blank face Astronomers hoped Pluto's craters would hold a record of impacts from its neighbours, which are too small to see – a new study dashes those hopes News
SpaceNASA's Messenger probe ready for final tour of Mercury With the first spacecraft to orbit Mercury about to fire its booster one last time, NASA is holding a public contest to name five of the planet's craters News