December 4

a) GAMMA RAY BURSTS
A gamma-ray burst set of pages from Nasa Goddard (link)
A similar set of pages from the NASA Swift Satellite site (link)

b) BLACK HOLE AT CENTER OF MILKY WAY
A bunch of images/movies of the Milky Way's center (stars orbiting the black hole).
THESE IMAGES ARE COURTESY OF DR. ANDREA GHEZ OF UCLA AND/OR DR RICHARD GENZEL OF
  MPE IN GERMANY.

 (1995-1998.gif)  (nature-galcenter.jpg) (few_orbits.jpg) (mov1.gif) (movflare.gif) (mov.mpg, MOVIE)

Links to Genzel's Galactic Center pages (you'll click on stuff to the left) (link)

c) MASSIVE BLACK HOLES IN THE CENTERS OF OTHER GALAXIES

Picture library of black holes (link)
John Kormendy's picture album (he's one of the active researchers/experts) (link)
Another great website (link)
Another HST picture (link)
HST Black Hole picture site (link)