Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Stephan's Quintet is a four ...

Astronomers have uncovered one of the earliest and most complex galaxy mergers ever observed — a system involving at least five physically interacting galaxies, spotted just 800 million years after ...

Is it possible for three supermassive black holes to blaze in radio bright phases all simultaneously? The answer to this question was recently given by astronomers, who confirmed that this is possible ...