
British Museum - Natural History best collection in the UK and a great website too. They also publish a very good book at a reasonable price
NASA's Jet Propulsion Lab Near Earth Object Program including a great multimedia presentation and also their Mars meteorite information
European Space Agency's Hubble Space Telescope site asteroid images
Space-Rocks Buy space rocks at reasonable prices from a UK teacher. From pocket money specimens for youngster to special kits for schools designed to support the Space@School website activities.