Superstar physicist Hawking—whose A Brief History of Time is ensconsed in the Guinness Book of Records for having had the longest. Listen to "Black Holes and Baby Universes and Other Essays" by Stephen Hawking available from Rakuten Kobo. Narrated by Simon Prebble. Start a free. PDF | We discuss the essential features of baby-universe production, starting from a description of black holes and wormholes, in terms of the.
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- Black holes - If our universe is a "baby universe" - Physics Stack Exchange
- Black Holes and Baby Universes by Stephen Hawking
- Condensed Matter
- And Other Essays
Neil deGrasse Tyson Length: The motto for anyone who falls into a black hole must be: What determines where the particles re-emerge.
The number of particles in the baby universe, will be equal to the number of particles that fell into the black hole, plus the number of particles that the black hole black hole and baby universe, during its evaporation.
This means that the particles that fall into one black hole, will come out of another hole of about the same mass. Black hole and baby universe, one might try to select where the particles would come out, by creating a black hole of the same mass, as that which the particles went down.
However, the black hole would be equally likely to give off any other set of particles with the same total energy.
Even if the black black hole and baby universe did emit the right kinds of particles, one could not tell if they were actually the same particles that went down the other hole.
Particles do not carry identity cards: What all this means, is that going through a black hole and baby universe hole, is unlikely to prove a popular and reliable method of space travel.
First of all, you would have to get there by travelling in imaginary time, and not care that your history in real time came to a sticky end.
Baby Universes, Children of Blackholes (Hawking speech)
Second, you couldn't really choose your destination. It would be a bit like travelling on some airlines I could name, but won't, because I would be sued. Thus, the present state of the universe would be the result of God's choice of the initial conditions.
The situation would be very different, however, if something like the no-boundary proposal were correct. Not much new, but people feel smarter just by buying a Hawking book.