Calculations suggest how black holes have amassed mass and predict what the black holes’ spins should be if this picture is correct.
Observations from the worldwide network of radio telescopes show the fire hose of plasma shooting from a distant galaxy does something strange near its source.
Detailed calculations reveal a surprise about how black holes bend light around themselves, opening a new possibility for future observations.
Two studies support the suspicion that our galaxy’s black hole had one or more outbursts a few million years ago.
The glow of a star torn up by a supermassive black hole has enabled researchers to measure how fast the black hole whirls around.