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Owen Gingerich

Messier 109

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m109,m109 galaxy,ngc 3992

Messier 109 (M109) is a barred spiral galaxy located in the constellation Ursa Major. The galaxy lies at a distance of 83.5 million light years and has an apparent magnitude of 10.6. It has the designation NGC 3992 in the New General Catalogue.
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Messier 47

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m47,ngc 2422

Messier 47 (M47) is a bright open star cluster located in the southern constellation Puppis. The cluster lies at a distance of 1,600 light years from Earth and has an apparent magnitude of 4.2. It has the designation NGC 2422 in the New General Catalogue.
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