NGC 7635

NGC 7635—Bubble Nebula in Cassiopeia (Sharpless 162, LBN 548, Caldwell 11)

The Bubble Nebula is an ionized hydrogen emission nebula 7,800 light years away, created by stellar winds from the Wolf-Rayet O-type star SAO 20575.

Melotte 15


Melotte 15

Melotte 15 is a very young star cluster in the IC 1805 nebula, also known as the Heart Nebula. It consists of massive OB stars with a mean age of only 1.5 million years. Melotte 15 is one of the core clusters of the Cas OB6 stellar association.

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