Quote:Why then was the early Universe not a black hole? Well, lets figure out its Schwarzschild radius to get a basic rule of thumb idea of what is going on.Rsch = 3km x Mass of the whole Universe in solar masses= about 10 to 100 billion light years= about the current size of the whole UniverseSo, in the basic definition of a black hole I used above (where the size of the object is smaller than the Schwarzschild radius) the whole Universe is one big black hole with us on the inside.
Greg - Celestron SkyScout 90mm refractor & planetarium
Quote:The question is, if the solar system were one of the stars, and an object from the outside fell in, What would you see? How would it appear? Bear in mind, even though you would see a boundary from the outside, there would not be a visible boundary from the inside.
Meade LX850 12" C 8SE Meade ETX 90
Quote:We are probably in a black hole. The question would be the same. If there was something outside the universe that fell in, what would you see?We just don't know if there is anything outside the universe.
"Scientists aren't perfect, just peer reviewed.""Eye of Sauron Observatory", featuring "Sauron's Other Eye", 16" dob, conical Royce mirror.
Quote:I think it's due to the size of the universe. It expanded faster than light so the visible universe doesn't include all the light. I think it's a matter of time for the doom.When I was in school the professor was explaining how the sun would become a red giant and engulf the earth in about 4 billion years. One of the students who was half asleep asked "how long?" The professor answered 4 billion years. The student said " Thank god, I thought you said 4 million years."
Quote:We are probably in a black hole. The question would be the same. If there was something outside the universe that fell in, what would you see?
Quote:If you want to think this way - I remember doing this simple calculation as a kid - since by definition you cannot escape the universe (if you exist, you are in the universe), the whole thing *must* be a black hole, with the redshift horizon as its Schwarzschild radius. (Everything beyond the redshift horizon is not in causal contact with us.) This lets you *calculate* the required density. It turns out to be right on the money I was once told you couldn't think this way. But that never stopped me!-drl
<Insert droll quotation or ridiculous equipment list here>
Quote:It can't disappear. Nothing can escape a black hole.
Quote:I am not sure how you would map the surface of a black hole with the inside. There is a discontinuity in spacetime. If something were falling in you would see it slow down and eventually stop at the surface. Time would stop. I don't know what would happen from the falling bodies' perspective. You can also never get any information on anything going on beyond the event horizon.
Quote:So, I would guess that if we are in a black hole, and there are objects falling though the event horizon, that we would perceive them only as a diffuse glow of electromagnetic radiation.
Clear Skies- Guy
“The first gulp from the glass of natural sciences will turn you into an atheist, but at the bottom of the glass God is waiting for you.” ― Werner Heisenberg
12" LX200 GPS
4" Unitron 150
4" Bosma refractor
Denk Binotron 27, D14's and D21's
Galaxy Note 8 running SkySafari Pro via Bluetooth
Wireless Autostar II