The Milky Way's center shows up in unprecedented detail in this composite of two galactic-plane surveys from the Spitzer Space Telescope. This view is a small portion of a 800,000 image, 4-billion-pixel mosaic created by combining the GLIMPSE and MIPSGAL surveys. Stars show up as blue, hot gas is green, and warm dust shows up as red. The galactic center is the brightest spot (center) in this image.
NASA/JPL-Caltech/Ed Churchwell (Univ. of Wisconsin-Madison) and Sean Carey (Spitzer Science Center)