Melotte 15, The Heart of the Heart NebulaMelotte 15 is the young star cluster at the very centre of the Heart Nebula in Cassiopeia, roughly 7,500 light years away. The massive stars there are responsible for sculpting these extraordinary pillars of gas and dust, carving them with intense radiation and stellar winds. It's a remarkably violent place that produces remarkably beautiful structures. This is a narrowband image using the Hubble Palette, mapping emissions from sulphur, hydrogen and
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