Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  HD15238  ·  HD15239  ·  HD15250  ·  HD15382  ·  HD15522  ·  HD15557  ·  HD15558  ·  HD15570  ·  HD15629  ·  HD15665  ·  HD15785  ·  HD15851  ·  HD16183  ·  HD16410  ·  HD236966  ·  IC 1805  ·  LBN 654  ·  LBN 655  ·  LBN 656  ·  LBN 657  ·  LDN 1360  ·  LDN 1361  ·  LDN 1362  ·  LDN 1363  ·  LDN 1364  ·  LDN 1365  ·  LDN 1366  ·  LDN 1367  ·  LDN 1368  ·  LDN 1369  ·  And 5 more.
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Heart Nebula IC1805  and Melotte 15, Coriorda
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Heart Nebula IC1805 and Melotte 15

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Heart Nebula IC1805  and Melotte 15, Coriorda
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Heart Nebula IC1805 and Melotte 15

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Description

The Heart Nebula (also known as the Running dog nebula), IC 1805Sharpless 2-190, is some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787.[1] It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.[2]The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26 or Melotte 15, 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.[1]

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Heart Nebula IC1805  and Melotte 15, Coriorda