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The Heart Nebula is 7,500 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 in November 1787. The Heart Nebula is made up of ionized Oxygen and Sulfur gasses, responsible for the rich colors seen in narrowband images. The shape of the nebula is driven by stellar winds from the hot stars in its core. The nebula spans almost 2 degrees in the sky, covering an area four times that of the diameter of the full moon
