Most people think of
the giant galaxies as islands of stars, gas and dust that block our universe
with its light. Theory, however, predicts that there are other types of
galaxies, devoid of stars, and consisting mainly of dense gas. These
"dark" galaxies you can not see on the black background of the
universe.
Now an international
team of astronomers has found a few bright galaxies, watching the glow of
hydrogen these galaxies, UV-induced nearby quasar HE0109-3518.
