Crosswords1 min ago
space
Answers
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For more on marking an answer as the "Best Answer", please visit our FAQ.www.mit.edu has started their open learning stuff, but is very thin on the ground for space stuff.
I find that for physics and astronomy the Answerbank has quite a few very good posters.
For space and that kind of stuff, put 'edu' or 'ac uk' in your search, will throw up universities, which often have lots of good stuff available for public access.
It's all relative though.
http://antwrp.gsfc.nasa.gov/apod/astropix.html
This is the astronomy picture of the day site by nasa. Use the archive and the search options. Each picture has an explanation with it.
http://photojournal.jpl.nasa.gov/index.html
Mostly just pictures
http://www.esa.int/esaCP/index.html
This is ESA's home page
http://hubblesite.org/
Pretty much what is says.
Also there is this site which is like wikipedia and is great at finding scientific terms, papers, definitions etc.
http://wordiq.com/
http://www.newscientistspace.com/article/dn7387
Sorry, couldn't help but laugh. Millions of dollars, huge obstacles to overcome (gravity trajectory calculations, airbags, thrust recalculations, object AI collision detection, the best telemetry ever)......gets stuck in sand. Hope he's got MAA cover..