entry number 51 in Charles Messier's famous catalog of the original spiral nebula, a large spiral galaxy with a well defined structure also cataloged as NGC 5194. Lie officially in the limits of the small constellation Canes Venatici. With more than 60,000 light years across, the spiral arms of M51 and dust lanes are clearly players in front of his companion galaxy (Right), NGC 5195.
image data of the Advanced Camera Tracking Telescope have been reprocessed to produce this alternative portrait of the well known interaction of two galaxies. That image processing has made very clear details, enhance color and higher contrast in weak areas, enlarging the dust lanes and flows across her small companion, along with features in the vicinity and center of M51 as such.
The couple is about 31 million light years away. Not far from the handle of the Dipper (Ursa Major), these galaxies lie officially in the limits of small constellation Canes Venatici.
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