Globular Cluster M15
M15, NGC 7078
M15's distance to Earth is about 32,600 light-years (10 kiloparsecs). Its distance to the galactic center of the Milky Way is about 34,000 light-years (10.4 kiloparsecs).
The image is about 59 arcseconds (2.8 parsecs or 9.2 light-years) in the horizontal dimension. Mass of the black hole: 4,000 times the mass of the Sun. Mass of the globular cluster: 600,000 times the mass of the Sun
WFPC2 Data Principal Astronomers: H. E. Bond (STScI), D. R. Alves (Columbia Astrophysics Lab.), M. Livio, L. K. Fullton and K. G. Schaefer (STScI)
STIS Data Principal Astronomers: R. Van Der Marel and J. Gerssen (STScI), K. Gebhardt (U. Texas at Austin), P. Guhathakurta and R. Peterson (UCO/Lick Observatory) and C. Pryor (Rutgers U.)
WFPC2: F439W (B), F547M (Strömgren y), F502N ([O III]), F656N (H alpha), F814W (I)