The black streak is the newly discovered Giant Coma Stream, which is ten times as long as the Milky Way
William Herschel Telescope/Román et al.
Astronomers have found the biggest stream of stars ever recorded. This tendril of stars is extraordinarily faint, but it and others like it could eventually help us unveil the true nature of dark matter.
The stream of stars, called the Giant Coma Stream, appears to float unmoored from any particular galaxy in the Coma galaxy cluster, about 300 million light years away from Earth. Javier Román at the University…