More information on Quasars
http://oposite.stsci.edu/pubinfo/mpeg/quasar.mpg
http://www.mssl.ucl.ac.uk/www_astro/agn/agn_quasartour.html
http://www.mssl.ucl.ac.uk/www_astro/agn/agn_unified.html

Glossary of  terms
http://archive.ncsa.uiuc.edu/Cyberia/NumRel/BlackHoleAnat.html

Animations and Illustrations
http://archive.ncsa.uiuc.edu/Cyberia/NumRel/BlackHoles.html
http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html
Black Holes

Albert Einstein and Relativity
 Albert Einstein Online
 AIP History: Albert Einstein Page
 University of Colorado Relativity Page
 Spacetime Wrinkles

X-ray Astronomy
 Chandra X-ray Observatory
 Imagine the Universe

Light and Spectroscopy
 http://www.mssl.ucl.ac.uk/www_astro/agn/agn_beginners.html
 http://chandra.harvard.edu/xray_astro/xrays.html

Ask a Space Scientist
 http://image.gsfc.nasa.gov/poetry/ask/abholes.html

More information on gravitational lensing
http://howstuffworks.lycos.com/black-hole3.htm
http://www.jb.man.ac.uk/merlin/about/layman/lens.html
http://www.physics.brown.edu/Studies/Demo/astro/demo/8c2040.htm
 

http://starchild.gsfc.nasa.gov/docs/StarChild/universe_level2/black_holes.html
http://image.gsfc.nasa.gov/poetry/newactiv.html
http://science.nasa.gov/headlines/y2000/ast15may_1m.htm?fp