"WASHINGTON (AFP) - US astronomers on Tuesday presented the most solid proof yet of the existence of dark matter, a mysterious substance believed to make up more than a quarter of the universe.

Astronomers using the Hubble Space Telescope spotted a ring of dark matter in a galaxy cluster some five billion light-years away from Earth, which measured some 2.6 million light-years across."

http://news.yahoo.com/s/afp/20070515/ts_alt_afp/usspacematter;_ylt=ApJm54w8Iq6zzG9BRGc8cJYXIr0F

Dark matter may be dark, but is it invisible?

If you don't care for reality, just wait a while; another will be along shortly. --A Rose