Muvlon t1_jebecrf wrote
Reply to comment by amitym in Ultramassive black hole over 30 billion times mass of our sun has been spotted. The discovery had been made possible thanks to a phenomenon known as gravitational lensing — the first time a black hole has been spotted in such a way. by Wagamaga
Ah, so it's the gravitation acceleration for a still standing obverser, not an infalling one or one that is in orbit.
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