Wikisky.org is a fascinating site that displays thousands and thousands of astronomical data in a Google Map-esque interface. The data is based upon the Sloan Digital Sky Survey (SDSS), which seeks to catalog around a million galaxies and quasars. The Wikisky application is almost overwhelming with data and information. It’s worth a bit of time to look around. Like most map interfaces, zooming in will get you some pretty decently detailed images that are very beautiful. Check it out.