About the Object Object Name: M15 (NGC 7078) Object Description: Globular Cluster in the Milky Way Galaxy Position (J2000): R.A. 21h 29m 58s Dec. +12° 10' 00" Constellation: Pegasus Distance: 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). Dimensions: The image is about 59 arcseconds (2.8 parsecs or 9.2 light-years) in the horizontal dimension. Masses: 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 About the Data Instrument: WFPC2 STIS Exposure Date(s): December 1998 October 1999, May/October 2001 Exposure Time: 3.7 hours 16 hours Principal Astronomers: H. E. Bond (STScI), D. R. Alves (Columbia Astrophysics Lab.), M. Livio, L. K. Fullton and K. G. Schaefer (STScI) 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.) Filters: F439W (B), F547M (StrÔø_Ôø_Ôø_mgren y), F502N ([O III]), F656N (H alpha), F814W (I) G430M About the Image Image Credit: NASA and The Hubble Heritage Team (STScI/AURA) Release Date: September 17, 2002 Orientation: Globular Cluster M15 [ http://imgsrc.hubblesite.org/hu/db/2002/18/images/b/formats/compass_large_web.jpg ] About the Object Object Name: G1 in M31 (Mayall II) Object Description: Globular Cluster in the Andromeda Galaxy Position (J2000): R.A. 00h 32m 46.9m Dec. +39° 34' 42" Constellation: Andromeda Distance: G1's distance to Earth is about 2.2 million light-years (675,000 parsecs). Its distance to the galactic center of M31 is about 120,000 light-years (36.8 kiloparsecs). Dimensions: The image is about 24 arcseconds (770 parsecs or 2500 light-years) in the horizontal dimension. Masses: Mass of the black hole: 20,000 times the mass of the Sun About the Data Instrument: WFPC2 STIS Exposure Date(s): July 1994 October - November 2001 Exposure Time: 1.9 hours 8.3 hours Principal Astronomers: M. Rich (UCLA), K. Mighell (NOAO), and J. Neill (Columbia U.), and W. Freedman (Carnegie Observatories) G430L, G750M Filters: F555W (V), F814W (I) M. Rich (UCLA), K. Gebhardt (U. Texas at Austin), and L. Ho (Carnegie Inst. of Washington) About the Image Image Credit: NASA and M. Rich (UCLA) Release Date: September 17, 2002 12:00 noon (EDT) Orientation: Globular Cluster M31 G1 [ http://imgsrc.hubblesite.org/hu/db/2002/18/images/c/formats/compass_large_web.jpg ] What is a Space Science Update? Major Hubble discoveries on NASA television ... Astronomers explain their Hubble discoveries at a press conference, called a Space Science Update (SSU), broadcast on NASA television. The SSU includes a question and answer session with members of the media. Back to top [ #top ] *News Release Number:*: STScI-2002-18a
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