New answers tagged mass
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From an outsider's perspective, how can a black hole grow if nothing ever crosses the event horizon?
Objects that approach the event horizon(from an outsider's perspective),will indeed appear to slow down and become increasingly redshifted as they get closer. As a result, it will take an infinite ...
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From an outsider's perspective, how can a black hole grow if nothing ever crosses the event horizon?
Due to time dilation, an outside observer never sees a falling object actually cross the event horizon.
This is correct, but perhaps not quite in the way that you visualize it.
It's trivially true, ...
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From an outsider's perspective, how can a black hole grow if nothing ever crosses the event horizon?
First off, there's no real time dilation effect. In coordinate systems that cover the event horizon (Kruskal-Szekeres, Eddington-Finkelstein, Gullstrand-Painlevé, Kerr-Schild), objects fall through it ...
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How do we estimate the dimensions and mass distribution of a galaxy's dark matter halo, beyond the effective limits of its visible matter?
A brief point about the Milky Way and most galaxies, at some point I was taught intergalactic space between stellar objects was essentially empty. I've since learned that where a galaxy "ends&...
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