The Gum Nebula (12 in his catalog) is the largest emission nebula in the sky, spanning about 36° in the constellations Vela and Puppis. Skip to content Introducing the all-new Astronomy.com Forum!

A deep-space panorama shows Comet 46P/Wirtanen, the Pleiades star cluster and a meteor crossing in front of the California Nebula.

The Visual Resources Center is a library of teaching and research images, primarily serving the College of Environmental Design at the University of California, Berkeley. We hold over 82,000 digital ...