The Crescent Nebula (also known as NGC 6888) is an emission nebula in the constellation Cygnus, about 5000 lightyears away from Earth. WR 134 is a Wolf-Rayet star located at about 6000 light years in constellation Cygnus. Wolf-Rayet stars are very bright (hundreds of thousands of times brighter than the Sun) and massive (more than 20 solar masses) variable stars. These stars are quite rare: only a few hundreds of them are known to date.

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