The Dumbbell Nebula, also known as Messier 27 (M27), is a bright, large planetary planetary nebula located in Vulpecula constellation. The nebula lies at a distance of 1,360 light years from Earth. It is sometimes also called the Apple Core Nebula or Diablo Nebula, and has the designation NGC 6853 in the New General Catalogue.
The Dumbbell Nebula was the first planetary nebula to be discovered. Charles Messier included it as M27 in his catalogue of deep sky objects in 1764.
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The Summer Triangle is one of the most familiar patterns in the northern summer night sky.
The three bright stars that mark the vertices of the Summer Triangle are Altair, Deneb, and Vega, the brightest stars in the constellations Aquila, Cygnus, and Lyra. The star pattern makes it easy to locate each of the three constellations.
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