Whirlpool Galaxy (M51 SDSS), image from the Sloan Digital Sky Survey
For over more than eight years, the astronomers at the Sloan Digital Sky Survey (SDSS) have worked tirelessly to map more than the night skies; from stars to entire galaxies, the SDSS compiles multi-colored images of deep space. To date, the SDSS has mapped more than a quarter of the sky.
Known as the Whirlpool Galaxy, M551 accounts for about three one-millionths of the sky area mapped by the SDSS.
Image courtesy The SDSS Collaboration, http://www.sdss.org
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