M101 – The Pinwheel Galaxy | Bernard Miller

Bernard Miller
Location of photo
Rancho Hidalgo, NM
Date/Time of photo
March 1 and 4, 2011
March 1 and 4, 2011 Rancho Hidalgo, NM TEC-140 APO (F7) SBIG ST8300M Luminance 16X10 minute exposures Red 8X10 minute exposures Green 8X10 minute exposures Blue 8X10 minute exposures
Here is a picture of M101, the Pinwheel Galaxy. The Pinwheel Galaxy is a face-on spiral galaxy 25 million light-years away in the constellation Ursa Major. M101 is a relatively large galaxy compared to the Milky Way. With a diameter of 170,000 light-years it is nearly twice the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small bulge of about 3 billion solar masses.
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