The Merope Nebula is a faint reflection nebula and suspected supernova remnant located in the Pleiades cluster (M45). The nebula surrounds the star Merope (23 Tauri), after which it gets its name. It has the designation NGC 1435 in the New General Catalogue.
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The Maia Nebula is a bright reflection nebula found in the Pleiades cluster (M45). The nebula has the designation NGC 1432 in the New General Catalogue. It occupies an area about 1.6 by 1.4 light years across.
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Messier 45 (M45), also known as the Pleiades or Seven Sisters, is a bright open star cluster located in the constellation Taurus, the Bull. The Pleiades cluster has an apparent magnitude of 1.6 and lies at an average distance of 444 light years from Earth. The cluster is also known as Melotte 22. It does not have an NGC designation.
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Messier 21 (M21) is an open cluster located in the southern constellation Sagittarius. It has an apparent magnitude of 6.5. The cluster lies at an approximate distance of 4,250 light years from Earth. Its designation in the New General Catalogue is NGC 6531.
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Messier 18 (M18) is a relatively dim open star cluster located in the constellation Sagittarius. The cluster lies at an approximate distance of 4,900 light years, or 1,500 parsecs, from Earth and has an apparent magnitude of 7.5. Its designation in the New General Catalogue is NGC 6613.
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