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The '''Heart nebulae''' (IC 1805, Sharpless 2-190) is an [[emission nebula]] in the [[constellation]] of [[Cassiopeia]],<ref name=constellation-guide/> Also known as the "Running Dog nebula," it is well-known for its intense red color and [[dust]] lanes that produce its distinctive heart shape. It forms a famous pair with the [[Soul nebula]], called the Heart and Soul nebula. These two nebulae are in fact connected via a bridge of [[gas]]. With its high [[star magnitude|magnitude]] +18.3, the nebula is hard to observe with small telescopes. It is best seen through astrophotography, making it a popular target for astrophotographers. The nebula is located close to Maffei 1 and Maffei 2, the two brightest [[galaxies]] in the Maffei Group. The brightest part of the nebula is classified as NGC 896 in the [[New General Catalogue]] as it was discovered before the whole nebula was observed.<ref>[https://www.space.com/38657-heart-nebula-deep-space-photo.html Star-Speckled Heart Nebula Glows Red in Lovely Deep-Space Photo] from space.com</ref>
The '''Heart nebulae''' (IC 1805, Sharpless 2-190) is an [[emission nebula]] in the [[constellation]] of [[Cassiopeia]],<ref name=constellation-guide/> Also known as the "Running Dog nebula," it is well known for its intense red color and [[dust]] lanes that produce its distinctive heart shape. It forms a famous pair with the [[Soul nebula]], called the Heart and Soul nebula. These two nebulae are in fact connected via a bridge of [[gas]]. With its high [[star magnitude|magnitude]] +18.3, the nebula is hard to observe with small telescopes. It is best seen through astrophotography, making it a popular target for astrophotographers. The nebula is located close to Maffei 1 and Maffei 2, the two brightest [[galaxies]] in the Maffei Group. The brightest part of the nebula is classified as NGC 896 in the [[New General Catalogue]] as it was discovered before the whole nebula was observed.<ref>[https://www.space.com/38657-heart-nebula-deep-space-photo.html Star-Speckled Heart Nebula Glows Red in Lovely Deep-Space Photo] from space.com</ref>
==Properties and Structure==
==Properties and Structure==