mrt 202013
Anne's Picture of the Day: Spiral Galaxy NGC 4639

March 20, 2013 NGC 4639, a barred spiral galaxy in Virgo Image Credit: A. Sandage (Carnegie Observatories), A. Saha (Space Telescope Science Institute), G.A. Tammann, and L. Labhardt (Astronomical Institute, University of Basel), F.D. Macchetto and N. Panagia (Space Telescope Science Institute and European Space Agency) and NASA NGC 4639 is a barred spiral galaxy [continue reading]