mei 042014
Anne's Image of the Day: Open Cluster NGC 6604

  May 4, 2014 NGC 6604, an open star cluster in Serpens Cauda Image Credit: ESO NGC 6604 (the bright grouping of stars towards to the upper left of this image) is a very young open star cluster with an age of some 4-5 million years in the star-forming (H II) region Sh2-54, located about 5,540 [continue reading]