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BioTechproject t1_ivytlf0 wrote

Reply to comment by chullyman in A first-of-its-kind experiment simulating the cosmos with ultracold potassium atoms suggests that in a curved, expanding universe pairs of particles pop up out of empty space by marketrent

everthying that is inside the event horizon is automatically part of the black hole, as nothing sub-light can escape. Since the particles are created at the boundary, one can be barely on the inside while the other is barely on the outside. The one outside can escape while the one inside is doomed. Since the energy comes from the point at the exact boundary, which is part of the black hole, it looses that energy and thus mass.

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