Messier 18. NGC 6613

Click on the image for a full resolution version         See this image also on Instagram     Messier 18 is an open cluster located 4,900 light years away in the constellation Sagittarius. This is a young (about 30 million years old) and small cluster, with about 40-50 stars, most of them belonging to the … Continue reading Messier 18. NGC 6613