The Heart Nebula
The Heart Nebula (also known as the Running dog nebula, IC 1805, Sharpless 2-190) is an emission nebula, 7500 light years away from Earth and located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787.Itdisplays glowing ionized hydrogen gas and darker dust lanes. This image was NASA's astronomy picture of the day this valentines day
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