Deep-sky objects shine and the giant planets show off their satellites as the bright light from the Moon disappears from our ...

The distinct spatial distributions of open and globular star clusters in spiral galaxies are a consequence of the interplay between gravity and conserved angular momentum, which facilitates the ...

The Beehive Cluster, also known as Messier 44 (M44), is an open star cluster made up of at least 1,000 stars and is one of the closest and youngest clusters to Earth. The cluster will be visible ...

"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 ...

M45, the Pleiades star cluster, displaying its spectacular nebulosity (Photo by: Alan Dyer /VW PICS/Universal Images Group via Getty Images) If you have ever looked at the night sky from the northern ...