Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5422  ·  NGC 5457  ·  The star 86UMa
M101 Pinwheel Galaxy, Richard Xiong
M101 Pinwheel Galaxy
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M101 Pinwheel Galaxy

M101 Pinwheel Galaxy, Richard Xiong
M101 Pinwheel Galaxy
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M101 Pinwheel Galaxy

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Description

M101 is a large galaxy comparable in size to the Milky Way. With a diameter of 170,000 light-years it is roughly equal the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.

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M101 Pinwheel Galaxy, Richard Xiong