This site is an astronomy tutorial posted by Gene Smith, a professor at UC San Diego. The site contains information on Quasars and Active Galaxies. Information is included on gravtional lensing, black holes, and redshift. Contains links for further information.
%0 Electronic Source %A Smith, Gene %D 1999 %T Quasars and Active Galaxies %V 2017 %N 27 June 2017 %9 text/html %U http://cass.ucsd.edu/archive/public/tutorial/Quasars.html
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