Blue Ring Nebula

Blue Ring Nebula

nebula with blue gas

Image of the Blue Ring Nebula, composed of expanding hydrogen gas (blue) expanding from a central star, which is the remnant core of a stellar merger. Shockwave filaments from the merging event are shown in red.

IMAGE: NASA/JPL-Caltech/NASA/JPL-Caltech/M. Seibert (Carnegie Institution for Science)/K. Hoadley (Caltech)/GALEX Team.