Mysterious flashing seen near supermassive black hole. Astronomers have an idea what it is
A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could ...
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Supermassive black hole spotted 12.9 billion light-years from Earth — and it's shooting a beam of energy right at us
The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes ...