Unusual green colour around "star"

• by Budgieye moderator

  

  http://spacewarps.org/subjects/standard/5183f151e4bb21021902fa82.png posted by Damon22

  What can be green?

  hot hydrogen at z<0.02 hot oxygen at z = 0.2 or 0.3

  (green quasars at z=4, but I think we can rule this out.)

  see Colours of Galaxies in SDSS : Redshift chart
  http://www.galaxyzooforum.org/index.php?topic=277142.0

  It doesn't look like a malfunction in the CCD scanner.

  I wonder what it is.

  Posted June 25, 2013 10:41 AM