mrt 292013
Anne's Picture of the Day: The Retina Nebula

March 29, 2013 The Retina Nebula, a planetary nebula in Lupus Image Credit: C. R. O’Dell (Vanderbilt Univ.) et al., Hubble Heritage Team, NASA The Retina Nebula (designated IC 4406) is a bipolar planetary nebula that measures about 0.13 × 0.45 light-year. It is located some 2,000 light-years away, near the western border of the southern constellation [continue reading]