SPACE PHOTOS THIS WEEK: Mars Mounds, Fausto Rages, More

SPACE PHOTOS THIS WEEK: Mars Mounds, Fausto Rages, More
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July 21, 2008—The Pinwheel galaxy, also known as Messier 101, shines in red and blue in a recently released Spitzer Space Telescope image that color-codes different wavelengths of infrared light.

The red regions around the galaxy's rim lack organic, carbon-containing molecules that are found throughout much of the rest of the pinwheel, astronomers reported on July 20 in the Astrophysical Journal.

"If you were going to look for life in Messier 101, you would not want to look at its edges," Karl Gordon, of the Space Telescope Science Institute, said in a NASA statement.

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—Image by NASA/JPL-Caltech/STScI
 
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