Messier 6. NGC 6405

Click on the image for a full resolution version   Messier 6 (M6) or NGC 6405 is a mature open cluster (age: about 100 Million years old). Usually, this kind of clusters contains only massive, hot, young blue stars, but M6’s brightest star is BM Sco, an orange K-type giant. This cluster is located in … Continue reading Messier 6. NGC 6405