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@joey_neilsen Check out the abstract! https://t.co/I6hxRqy5xZ
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There are lots of ways (i.e. coordinate systems) that we can use to represent spacetime around a black hole. This one's called a Kruskal–Szekeres diagram. Think of "v" as the horizon; imagine you start at s and fall along the line γ. https://t.co/O8QWT0pKN