"What's this?" you say. "Another picture of space?" Well, yes. Except that doesn't quite get at it. The picture above is one tiny, small, infinitesimally minuscule portion of a 2.5 billion pixel 800,000 picture mosaic of the entire galaxy, as done by the Spitzer Space Telescope. This will give you sort of the idea of what it'll look like when chained together:
It is being unveiled at the Adler Planetarium in Chicago today. So if you like mosaics of the universe so large that it is "almost too big for astronomers to probe in detail", head on down. Otherwise you can just download 16 jpeg files that are about 35 MB a piece and get a gander at the home galaxy. If you're interested, there's also a video about how they made it.
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