Which parameter of the present universe,more than any other,is considered to be critical in determining the ultimate fate of the universe?
A) The average density of neutrinos
B) The average density of matter
C) The average density of black holes throughout the universe
D) The average density of photons of radiation

Question

Quizplus · Accepted Answer

The average density of matter is the most critical parameter in determining the ultimate fate of the universe. If the average density of matter is high, then the universe will eventually stop expanding and collapse in on itself in a "big crunch". If the average density of matter is low, then the universe will continue to expand forever. This is known as the critical density and is currently estimated to be around 5 atoms per cubic meter.

Which Parameter of the Present Universe,more Than Any Other,is Considered