Blue Ring Nebula (IMAGE)

Princeton University

Blue Ring Nebula

Caption

A team of scientists including Princeton's Guðmundur Stefánsson investigated the mysterious Blue Ring Nebula, composed of expanding hydrogen gas (blue) expanding from a central star, which is the remnant core of a stellar merger. Red filaments are shockwave filaments from the merging event.

Credit

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

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