M 15

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Description: This star cluster orbits our own galaxy, the Milky Way, making one revolution every 250 million years. It has a mass of nearly one million Suns. It has one of the most concentrated cores of any cluster. It also has a planetary nebula (Pease 1) within the cluster.
Constellation: Pegasus
Distance: 34 thousand light years
Apparent Size: 12.3'
Date: 2 september 2005
Equipment: 12.5" RC @ f/9, ST10XME, AP 1200GTO
Exposure: RGB: 20-20-20 minutes