VideoCelestial time travel: How asteroids can reveal the history of space Comets and asteroids are among the solar system’s oldest inhabitants. For Natalie Starkey, that makes them invaluable time capsules Video
SpaceThe solar system has too many moons – it's time for a cull Designating rocks just a few kilometres across as moons is misleading and ridiculous. We need to do a Pluto and cut moons down to size, argues Leah CraneComment