[Discover] The Size Of Our World http://www.rense.com/general72/size.htm
(science astronomy sun visualization) 
[Discover] WIKISKY.ORG http://www.wikisky.org/ (visualization astronomy maps science)
[Discover] Hubble Heritage Gallery of Images http://heritage.stsci.edu/gallery/gallery.html (science space photography nasa)
[Discover] Starbox - Rating stars for prototype http://www.nickstakenburg.com/projects/starbox/ (javascript rating prototype stars)
[Discover] Chandra :: Educational Materials :: Stellar Cycles Post Assessment Activity http://www.chandra.harvard.edu/edu/formal/stellar_cycle/ (lessons stars astronomy science)
[Discover] Stellarium http://www.stellarium.org/ (astronomy opensource science space)
[Discover] Amazing Space: Explorations http://amazing-space.stsci.edu/resources/explorations/ (science lessons resources webquests)
[Discover] WIKISKY.ORG http://www.wikisky.org/ (visualization astronomy maps science)
[Discover] Hubble Heritage Gallery of Images http://heritage.stsci.edu/gallery/gallery.html (science space photography nasa)
[Discover] Starbox - Rating stars for prototype http://www.nickstakenburg.com/projects/starbox/ (javascript rating prototype stars)
[Discover] Chandra :: Educational Materials :: Stellar Cycles Post Assessment Activity http://www.chandra.harvard.edu/edu/formal/stellar_cycle/ (lessons stars astronomy science)
[Discover] Stellarium http://www.stellarium.org/ (astronomy opensource science space)
[Discover] Amazing Space: Explorations http://amazing-space.stsci.edu/resources/explorations/ (science lessons resources webquests)