"Clusters rich in red supergiants are very rare and tend to be very far away, but they play a crucial role in understanding key aspects in the evolution of massive stars." When you purchase through ...

Warm mid-August summer nights offer prime conditions for spotting three magnificent star clusters visible to northern-hemisphere skywatchers in the coming months. Star clusters are gravitationally ...

The Hyades, Pleiades and Hercules star clusters make for excellent targets in the late summer months. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...