Cosmic caterpillar
The constellation of Cygnus contains a light-year-long knot of interstellar gas and dust. This caterpillar-like cloud is a protostar in the first stages of its evolutionary journey to become a young, bright star. Around 65 O-type stars are blasting the protostar with winds of ultraviolet radiation, creating its unique appearance. These O-type stars are around 15 light years away from the protostar.