Editing Hubble Space Telescope (section)

==== Black holes ====
The high-resolution spectra and images provided by the HST have been especially well-suited to establishing the prevalence of [[black hole]]s in the center of nearby galaxies. While it had been hypothesized in the early 1960s that black holes would be found at the centers of some galaxies, and astronomers in the 1980s identified a number of good black hole candidates, work conducted with Hubble shows that black holes are probably common to the centers of all galaxies.<ref>{{cite web |url=http://nssdc.gsfc.nasa.gov/photo_gallery/caption/hst_blkhole.txt |title=Hubble Confirms Existence of Massive Black Hole at Heart of Active Galaxy |publisher=Goddard Space Flight Center |date=May 25, 1994 |access-date=April 26, 2008 |archive-date=September 18, 2011 |archive-url=https://web.archive.org/web/20110918102629/http://nssdc.gsfc.nasa.gov/photo_gallery/caption/hst_blkhole.txt |url-status=live }}</ref> The Hubble programs further established that the masses of the nuclear black holes and properties of the galaxies are closely related.<ref>{{cite journal |last1=Gebhardt |first1=K. |last2=Bender |first2=R. |last3=Bower |first3=G. |last4=Dressler |first4=A. |last5=Faber |first5=S. M. |last6=Filippenko |first6=A. V. |last7=Green |first7=R. |last8=Grillmair |first8=C. |last9=Ho |first9=L. C. |last10=Kormendy |first10=J. |display-authors=4 |date=2000 |title=A Relationship between Nuclear Black Hole Mass and Galaxy Velocity Dispersion |journal=The Astrophysical Journal |volume=539 |issue=1 |pages=L13–L16 |arxiv=astro-ph/0006289 |bibcode=2000ApJ...539L..13G |doi=10.1086/312840 |s2cid=11737403}}</ref><ref>{{cite journal |last1=Ferrarese |first1=Laura |last2=Merritt |first2=David |author2-link=David Merritt |date=2000 |title=A Fundamental Relationship between Supermassive Black Holes and their Host Galaxies |journal=The Astrophysical Journal |volume=539 |issue=1 |pages=L9–L12 |arxiv=astro-ph/0006053 |bibcode=2000ApJ...539L...9F |doi=10.1086/312838 |s2cid=6508110}}</ref>