Astronomy Picture of the Day 25.11.2013

The galaxy NGC 4921 is located 320 million light-years away from us. The image was taken by the Hubble Space Telescope. This spiral galaxy is classified as anemic. Because the galaxy's nebulae have diminished, resulting in very little star formation, it can also be considered a dead galaxy. For the larger image, see here You can click.

NASA/JPL-Caltech/University of Arizona

This nebula, which you've probably never seen before, is the Rosetta Nebula (Rosetta is a name I haven't figured out), located 5,200 light-years away. It's quite large. It's 130 light-years across and has the mass of 10,000 solar masses. It's also filled with the light of a multitude of energetic baby stars.