Template:POTD/2018-05-06

Picture of the day

An ultraviolet image of the Cygnus Loop, a large supernova remnant in the constellation Cygnus. Different parts of the loop emit electromagnetic radiation in different ranges, including visible light for the arcs known collectively as the Veil Nebula. The complete loop is only revealed through radio, infrared, and X-ray images.Photograph: NASA/JPL-Caltech