mrt 042013
 
Anne's Picture of the Day: Emission Nebula RCW 120

March 4, 2013 RCW 120, a galactic bubble in Scorpius Image Credit: NASA/JPL-Caltech RCW 120 (also known as Sh 2-3 or Gum 58) is an emission nebula, a star-forming (H II) region of about 10 light-years across that lies some 4,500 light-years away from Earth, slightly above the flat plane of our galaxy in the [continue reading]