Black holes
Using Spectroscopy to Measure Velocity Dispersion
September 17, 2002 · NASA · M15, M31 G1
More Hubble images of M15, M31 G1
Relation of Black Hole Mass to Cluster MassSeptember 17, 2002
Relative Location of M15 and M31 G1September 17, 2002
Evidence for Existence of a Black HoleSeptember 17, 2002
Location of M15 and M31 G1 in the Northern Autumn SkySeptember 17, 2002
Where Did That Black Hole Come From?September 17, 2002
Black Holes Unexpectedly Discovered in Globular Clusters M15 and G1September 17, 2002Globular Cluster M15September 17, 2002
Globular Cluster M31 G1September 17, 2002