After doing searches on astronomy on main search engines like Google, Yahoo, and bing, and searches on meta-search engines like Metacrawler, Dogpile, and Ixquick. I found some similarities but also some differences. When I searched on the main search engines I got a lot of the same results. More major and educational sites, the meta databases also showed the same major sites. Some differences in searches through the meta-search engines brought up smaller sites but the sites seemed more credible. I would definitely be able find a lot of good sources for a paper using all of these search engines