description Sharpless 2-101 Overview
Sharpless 2-101, commonly known as the Tulip Nebula, is an emission nebula and H II region located in the constellation Cygnus. Cataloged by astronomer Stewart Sharpless in 1959, the nebula is situated near the famous X-ray source Cygnus X-1, which was one of the first widely accepted black hole candidates. It is a star-forming region composed of ionized hydrogen gas that glows when energized by nearby hot stars. The nebula is a popular astrophotography target for amateur astronomers due to its distinctive shape.
help Sharpless 2-101 FAQ
Where is the Tulip Nebula located in the night sky?
The Tulip Nebula, formally cataloged as Sharpless 2-101, is located in the constellation Cygnus. It is an emission nebula situated roughly 6,000 light-years away from Earth.
Why is Sharpless 2-101 called the Tulip Nebula?
It earned its popular name because its glowing cloud of hydrogen gas resembles the shape of a blooming tulip flower in long-exposure astrophotography. The nebula appears red and blue due to the ionization of hydrogen and oxygen gases by nearby young stars.
Is the Tulip Nebula near the Cygnus X-1 black hole?
Yes, Sharpless 2-101 is located very close in the sky to Cygnus X-1, one of the first widely accepted black hole candidates. The blue giant star feeding the Cygnus X-1 black hole is also responsible for illuminating the gases of the Tulip Nebula.
Who cataloged Sharpless 2-101?
The nebula was cataloged by American astronomer Stewart Sharpless in his 1959 'A Catalogue of H II Regions.' His comprehensive list of emission nebulae mapped out glowing clouds of ionized gas across the Milky Way.
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