Virgo Cluter information
to get images of POSS -
http://stdatu.stsci.edu/cgi-bin/dss_form (This makes a FITS file that can be
viewed in ImageJ.)
nice images of virgo cluster of galaxies
http://www.urania.be/sterrenkunde/sterrenstelsels/clusters.php
http://home.earthlink.net/~fct150b/virgo_hi_res.htm
information on Virgo
http://www.ngc7000.org/ccd/gal-virgocluster.html