M51, the Whirlpool Galaxy
amateur image processing,
stars and galaxies
On July 14, 2011, Deep Impact turned its Medium Resolution Imager toward M51, the Whirlpool Galaxy, and took 65 photos. This image is composed of six clear-filter exposures, stacked to reduce the noise from cosmic ray hits.
NASA / JPL / UMD / processed by Emily Lakdawalla
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Original image data dated on or about July 14, 2011