Hope this is not old news.... Google and the NASA have signed a formal collaboration agreement that calls for Google to help make NASA information readily accessible on the Web. http://www.pcworld.com/article/id,128255-c,google/article.html
NASA better be careful. Google has a history of indexing pages that people don't want them to. Not to mention keeping cached copies of pages that have been deleted already. NASA has to make sure to keep the aliens a secret, because there are enough freaky space religions on this planet already.
I think only those information which can be seen from their web by anybody will be showed in google search. For others, it's very easy to block googlebot. At least google is not a hacker.
Well, that's something to look forward in their partnership. And I would love to know if freaking aliens really exists.