Messier 4

Where Are the Missing Black Holes? The Hubble May Have Helped Find One

Most black holes are stellar mass black holes. They're created when a star several times more massive than our Sun…

1 year ago

Messier 4 (M4) – The NGC 6121 Globular Cluster

During the late 18th century, Charles Messier began to notice that a series of “nebulous” objects in the night sky…

8 years ago