August 21, 2014

Homework Help: Astronomy

Posted by qwerty on Tuesday, October 1, 2013 at 5:13pm.

Why didn’t the Universe collapse into a black hole in the past when there was so
much matter in such a small space?

(a) Most of the particles in the early Universe were unstable and decayed before a black
hole could form. By the time only stable particles were left (protons, electrons, etc.),
the Universe had expanded to be large enough so that it would not collapse into a black
(b) Quantum gravity—which is relevant at high energies and small distances—stabilized the
Universe and prevented a collapse into a black hole.
(c) Particles in the early Universe had a lot of kinetic energy (the temperature was very
high!), preventing them from becoming gravitationally bound and collapsing into a black
(d) It actually could have collapsed into a very giant black hole that we are now living inside

Answer this Question

First Name:
School Subject:

Related Questions

physics - 1. If our sun shrank in size to become a black hole, using the ...
Writing I - Label each sentence below. Use S for simple, CD for compound, CX for...
Physics - A spacecraft in the shape of a long cylinder has a length of 100 m, ...
Physics - The Hubble Space Telescope (HST) has recorded evidence of a black hole...
Astronomy - Purpose the run somehow becomes a black hole without change in its ...
Astronomy - What is the size, i.e. the radius, of a black hole with a mass equal...
physics - what is a black hole and how does a black hole form?
Astronomy - Which event is likely to trigger rapid growth in supermassive black ...
physics (check my answers) - When the nuclear fuel in the sun is gone, the sun ...
astronomy - Can CMB show that the universe was accelerating at the time the CMB ...