Nearly 14 billion years ago, there was nothing and nowhere. Then, due to a random fluctuation in a completely empty void, a universe exploded into existence. Something the size of a subatomic particle inflated to unimaginably huge size in a fraction of a second, driven apart by negative-pressure vacuum energy. Scientists call this theory for the origin of the universe the Big Bang.
The heat death of the universe is a suggested ultimate fate of the universe in which the universe has diminished to a state of no thermodynamic free energy and therefore can no longer sustain processes that consume energy (including computation and life).
Overturning a theory – Steady State vs Big Bang. steady_state_big_bangWhat happens when you have two theories that contradict each other, as is the case with the Steady State and Big Bang theories? For a very brief summery on these theories. the Steady State theory says the universe is Steady and doesn’t change whereas the Big Bang theory says the universe started at some point in time in a ‘big bang’. In this case, scientists make observations, hypothesis and testable predictions to figur…
In cosmology we believe that the universe started off in a big bang 13.7 billion years ago. All alternatives have been pretty much ruled out. Steady state theories, other alternatives have been ruled out. However, how will the universe end? We have several possibilities. One possibility is a big crunch when the universe squashes together in a gigantic ball of flame and maybe bangs once again.