Star formation helps shape a galaxy's structure through shock waves, stellar winds, and ultraviolet radiation. In this image of the nearby Sombrero Galaxy, IRAC clearly sees a dramatic disk of warm dust, visible in red, caused by star formation around the central bulge, seen in blue. The Sombrero is located 28 million light-years away in the constellation Virgo.
April 19, 2012 10:35 AM PDT
Photo by: NASA / JPL-Caltech / R. Kennicutt (Univ. of Arizona)