Messier 55. NGC 6809

  Click on the image for a full resolution version     Messier 55, also known as M55 or NGC 6809, is a rather bright globular cluster in the constellation Sagittarius. This cluster is also known as the “Summer Rose star”. There is a good explanation about this cluster at the Messier-Objects page.   This … Continue reading Messier 55. NGC 6809