SpaceGrand Theft Sedna: how the sun might have stolen a mini-planet Sedna is one of several "ice dwarfs" in our solar system with bizarre orbits. Could the young sun's gravity have snatched them from a passing star? News
SpaceFirst visit to Pluto could rewrite the solar system's story Rivers of neon, geysers of nitrogen, an oddly giant moon: the New Horizons probe promises revealing spectacles – and insights into deep solar system history Features