The Crescent. This wild nebula, NGC 6888 in Cygnus, is a result of competing stellar winds shed from the Wolf-Rayet star within. Late in its life, the star is actively fusing heavy elements. This violent production of energy has blown out most of the hydrogen and helium from the star’s outer atmosphere, giving rise to the delicate and fascinating structure of the surrounding emission nebula, which was captured here thanks to nearly 27 hours of exposure time.