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Mean IC1805-Ha-31x20min Scaled-2-90gr-rotated
Midden van de Hartnevel IC1805 dat aangeduid wordt als Melotte 15, gefotografeerd met Atik383L en RC8 telescoop in Ha. Totaal belichtingstijd: 10 uur vanuit Dordrecht. The Heart Nebula, IC 1805, Sh2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing gas and darker dust lanes. The nebula is formed by plasma of ionized hydrogen and free electrons. The very brightest part of this nebula (the knot at the right) is separately classified as NGC 896, because it was the first part of this nebula to be discovered. The nebula's intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars known as