Messier 57

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Dumbbell Nebula – Messier 27

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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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Ring Nebula (M57) in Lyra

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The Ring Nebula, or Messier 57, is a famous planetary nebula located in Lyra constellation, south of Vega, the fifth brightest star in the sky.

The nebula was formed about 4,000 years ago, when the central star, a red giant, ejected a shell of ionized gas in the final stage of its evolution before becoming a white dwarf.

M57 is classified as a bipolar nebula, one whose equatorial rings visibly enlarge the nebula’s structure and give it a symmetric bi-lobed appearance. It is often confused with the Helix Nebula in Aquarius, another famous planetary nebula that has the appearance of a celestial eye.
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