4 ms·
So I wonder, where are these giant black holes now? There should be some closer to us than at the edge of the universe, unless something happens to them.
by analog31 3mo ago
So I wonder, where are these giant black holes now? There should be some closer to us than at the edge of the universe, unless something happens to them.
- tgarrett 3mo agoThe supermassive black hole in the giant elliptical galaxy M87 is merely ~53 million light years away, close enough that we have now imaged it: https://en.wikipedia.org/wiki/Messier_87#Supermassive_black_hole_M87* https://en.wikipedia.org/wiki/Messier_87#Supermassive_black_...
- blacksmith_tb 3mo agoSagittarius A* is "merely" 26 thousand light years away (but we probably won't be imaging it, since there's a lot more in the way)
- windsurfer 3mo agoThe M87 supermassive blackhole is thousands of times as massive as Sagittarius A*, but since Sagittarius A* is a lot closer their emission rings appear roughly the same size in the sky (42 μas vs 51 μas). Both have already been imaged by the Event Horizon Telescope. https://en.wikipedia.org/wiki/Event_Horizon_Telescope https://en.wikipedia.org/wiki/Event_Horizon_Telescope
- erulastiel 3mo agoWe’ve already imaged it with the event horizon telescope. https://en.wikipedia.org/wiki/Sagittarius_A*?wprov=sfti1# https://en.wikipedia.org/wiki/Sagittarius_A*?wprov=sfti1#