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No. In fact, the entire observable universe is a black hole: the Schwarzschild radius of the mass of the observable universe is greater than the observable size
by garmaine 6y ago
No. In fact, the entire observable universe is a black hole: the Schwarzschild radius of the mass of the observable universe is greater than the observable size, meaning by the technical definition of a black hole we are living within one: light from Earth sent into the darkest region of the sky will not escape the gravitational pull of the whole universe, even before considering expansion rates.
- ptspin 6y agoThe Schwarzschild radius for the mass of the observable universe is about 13.7 Billion Light Years while the observable universe is about 93 Billion Light Years across (radius ~46 Billion Light Years). So the universe is not itself a black hole (until you take expansion rates into account)
- garmaine 6y agoI think you have that backwards--you have to take expansion into account for the "observable" universe to be that large, since the age of the universe is only 13.7 billion years.