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Oct 19, 2020 at 0:22 comment added hirschme Thank you for the answer. However I am not sure I understand the message: This seems to relate to a habitable planet orbiting a supermassive black hole, but in the question I am just referring to a moving observer (on a ship), no need for a heating planet in orbit? At last sentence claims "a long way out". What does this mean is the purpose of the question: How far out? And after answering that: How big would the black hole be after bein that "far out" ?
Oct 15, 2020 at 16:59 history answered user24157 CC BY-SA 4.0