A glimpse of the oldest light in the universe, as seen by the WMAP satellite.
This overlay, which maps out differences in temperatures in the Cosmic Microwave Background radiation, was created from data from the Wilkinson Microwave Anisotropy Probe satellite. This map provides astronomers with the deepest possible look at the universe; the photons making up this image have traveled through space for over 13 billion years. The Microwave Sky helps researchers learn about the infancy of the universe, and puts our own Galaxy into new perspective. You will need to switch to Sky in Google Earth 4.2 to view this content.