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M101, stack of 20, 15s exposures. with a 150mm, f/5, AZ Newtonian. For Outreach, Observing and imaging.

The Pinwheel Galaxy is a face-on spiral galaxy distanced 21 million light-years away in the constellation Ursa Major, first discovered by Pierre Méchain on March 27, 1781, and communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries.

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