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Melotte 15: Open Cluster in Cassiopeia

The Heart of Heart Nebula - IC1805

This is the H-HO-O bicolor combination. Melotte 15 is a very loose open cluster in the central regions of emission nebula IC 1805 (Heart Nebula) located about 7500 light years away. It is catalogued by the British-Belgian astronomer Philibert Jacques Melotte (1880-1961). This open cluster is about 1.5 million years young and contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun’s mass.Velimir Popov

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    The Heart of Heart Nebula - IC1805 This is the H-HO-O bicolor combination. Melotte 15 is a very loose open cluster in...
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