Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471  ·  NGC 5477
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M101, Richard Blake
M101
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M101

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M101, Richard Blake
M101
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M101

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Description

M101 is a large galaxy, with a diameter of 170,000 light-years. By comparison, the Milky Way has a diameter of 100,000[12] light-years. It has around a trillion stars, twice the number in the Milky Way.[13] 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. Per Wikipedia

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M101, Richard Blake