Sh2-119 vs Sh2-115
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Sh2-119
Sh2-119, also known as the Clamshell Nebula, is an H II region in the constellation Cygnus. It surrounds the O-type star 68 Cygni and forms a ring-shaped Strömgren sphere, created by the star's intense ultraviolet radiation ionizing the surrounding hydrogen gas. The nebula is listed in the Sharpless catalog of emission nebulae and is located approximately 5,000 light-years from Earth. It is often...
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Sh2-115
Sh2-115 is an emission nebula and H II region in the constellation Cygnus, catalogued in Stewart Sharpless's survey of ionized hydrogen regions. It lies in a rich Milky Way star field northwest of Deneb and is associated with active star formation; radiation from hot young stars, including members of the open cluster Berkeley 90, ionizes its gas. Its broad, faint structure makes it a target for wi...
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