Friday, September 28, 2007
1.5 APOD
I chose this picture because it is of the Corona Australis, or the Southern Crown, which is one of our constellations of the week. In this picture we see infrared light coming from stars and cosmic dust, as well as x-rays coming from developing young stars. Clearly, this picture is done in false color because neither x-rays nor infrared light is visible. The grouping of bright stars is called the Coronet Cluster and it's interesting because it is made up of stars with very different sizes, as well as different stages of development. This cluster is about 420 light-years away from us, which is a relatively short distance. The image comes from the Chandra orbiting observatory and the Spitzer Space Telescope.
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