www.nasa.gov – The homepage of NASA, the American space agency, who send out many missions a year, such as the Cassini probe currently orbiting around Saturn.

www.esa.int – The European space agency homepage, with an interactive program for viewing satellite imagery of the planet.

www.newscientist.com/space - A site with many news stories related to Astronomy.

www.astronomynow.com – A British astronomy magazine homepage, with helpful advice for starwatching at home and with news stories related to astronomy.

http://www.bbc.co.uk/dna/h2g2 - An unofficial guide to everything, with a large section about the universe. Note that content is user added.

http://www.planetary.org/home - The home page of the Planetary Society, a group dedicated to advancing human exploration of space.

Edexcel GCSE Astronomy - Resources for those interested in doing GCSE Astronomy.