The Hubble telescope has found a long-sought population of "stellar outcasts" ? stars tossed out of their home galaxies into the dark emptiness of intergalactic space. This is the first time stars have been found more than 300,000 light-years (three Milky Way diameters) from the nearest big galaxy.
The isolated stars dwell in the Virgo cluster of galaxies, about 60 million light-years from Earth. The results suggest this population of "lone stars" accounts for 10 percent of the Virgo cluster's mass, or 1 trillion Sun-like stars adrift among the 2,500 galaxies in Virgo. This is an illustration of... Read more