This crescent-shaped cocoon of gas and dust is nebula known as NGC 3199. It’s about 12,000 light-years away in the constellation Carina. The nebula’s bright crescent feature is now known to be part of a much larger but fainter bubble of gas and dust.
The nebula surrounds a star catalogued as HD 89358 which is an extremely hot and massive type known as a Wolf-Rayet star. HD 89358 generates incredibly intense stellar winds twist the nebula’s gas and dust into it’s lopsided shape.
Image Credit: ESO