One study, set to appear in Friday's issue of the journal Science, focused on a galaxy more than 1.5 billion light-years away as a supermassive black hole at its center was waking up following a dormant period.
One study, set to appear in Friday's issue of the journal Science, focused on a galaxy more than 1.5 billion light-years away as a supermassive black hole at its center was waking up following a dormant period.