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- TL;DR Summary
- When particles cross the event horizon, can we still get information, such as their mass/charge, from the horizon? The information is available for how long? Is it still available after Hawking radiation has "returned" the particle back to the observable universe?

When objects/galaxies (particles and antiparticles) move across the cosmological event horizon, do they leave behind an “image” on the horizon, such that when we look at the image, we can tell what kinds of objects went through to the other side (ie, we would know information such as the mass and charge of the objects)?

If an object of, say, 5 kg moves across the cosmological event horizon, is it true that Hawking radiation (from the horizon) would “return” 5 kg of matter back to the observable universe over time? Therefore, would it be correct to say that conservation of mass/charge/energy/momentum/angular momentum/spin all holds true in the observable universe (taken as a whole) over time (apart from the gain in energy due to the gain in dark energy from the expansion of the universe)?

And when Hawking radiation has finished returning the 5 kg of matter (that was lost previously to the other side of the horizon), does the “image” of the original object then disappear from the horizon (surface)?

Do answers to the above apply equally to the black-hole event horizon too?

If an object of, say, 5 kg moves across the cosmological event horizon, is it true that Hawking radiation (from the horizon) would “return” 5 kg of matter back to the observable universe over time? Therefore, would it be correct to say that conservation of mass/charge/energy/momentum/angular momentum/spin all holds true in the observable universe (taken as a whole) over time (apart from the gain in energy due to the gain in dark energy from the expansion of the universe)?

And when Hawking radiation has finished returning the 5 kg of matter (that was lost previously to the other side of the horizon), does the “image” of the original object then disappear from the horizon (surface)?

Do answers to the above apply equally to the black-hole event horizon too?

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