Rare View of Black Hole Caught in 'Bull's-Eye' Eruption (Video)
Saturday, July 18, 2015 - 09:00
in Astronomy & Space
Rings of X-ray light flare and fade around an active black hole in a stunning new set of observations by NASA's Swift space telescope. The bull's-eye structure results from the reflection of X-ray light by dust, which creates a series of "echoes."