1.What are the three main cosmological facts? 2.Describe the steady state theory
ID: 121063 • Letter: 1
Question
1.What are the three main cosmological facts?
2.Describe the steady state theory and discuss how it explains (or fails to explain) the three main cosmological
facts.
3.Describe the “Big Bang” theory and discuss how it explains the three main cosmological facts.
4.According to the “Big Bang” theory, how old is the universe? Indicate two ways this age is arrived at?
5.What do the terms “open” and “closed” mean when used to describe the universe? What physical parameter determines which kind we have?
Explanation / Answer
SOLUTION:-
Cosmology: is the study of the Universe in its totality, and by extension, humanity's place in it. In between the doctrines of religion and science, stands the philosophical perspective of metaphysical cosmology. This ancient field of study seeks to draw logical conclusions about the nature of the Universe, man, god and/or their connections based on the extension of some set of presumed facts borrowed from religion and/or observation. Cosmology is often an important aspect of the origin beliefs of religions and mythologies that seek to explain the existence and nature of the reality.
One of the main cosmological facts are the Big bang there was a gravitational singularity. The big bang was responsible for the 'creation' of space and time, anything before the big bang(the singularity) is not subject to before, the first cause, physical laws, etc. Therefore, the gravitational singularity is already unbounded by space and time i.e. can also be classified as beyond time, and therefore no creator or first cause is required. The unification between quantum mechanics and general relativity would be the final nail in the coffin for the first cause argument.
According to general relativity, a singularity is entirely compressed into a region with zero volume, which means its density and gravitational pull are infinite, and so is the curvature of space-time which it causes. These infinite values cause most physical equations, including Einstein’s general relativity, to stop working at a singularity i.e the gravitational singularity or at the center of a black hole.
The another theory or facts is steady state theory The other set (including Steady State theory) involve the behavior of a universe where the energy density remains constant; new energy is slowly being created as space expands, so that the density remains the same... for eternity.
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