Our group used the following sites:

• www.cosmos.org
• http://www.chesapeakclimate.org/
• http://en.wikipedia.org/wiki/Supernova
• http://img.photobucket.com/albums/v366/Rusty5/MyFavouriteThings/Bluemc_Ion.jpg
• http://www.fortunecity.com/tatooine/watchmen/974/
• http://www.howstuffworks.com/terraforming.htm
• http://en.wikipedia.org/wiki/Terraforming
• http://www.users.globalnet.co.uk/~mfogg/gjerde.htm
• http://www.redcolony.com/art.php?id=034180&printer=true
• http://www.whitchurch-school.org.uk/generalinf/newsitems/nasaproj/
• http://www.users.globnet.co.uk/~mfogg/pioneer.htm
• http://www.absoluteastronomy.com/encyclopedia/t/te/terraforming.htm
  

We would like to thank all the creators of these sites.