What (if any) state did energy exist in prior to the big bang?
4087
Did spacetime start with the Big bang?
37587
What has been proved about the big bang, and what has not?
12992
Why did the universe not collapse to a black hole shortly after the big bang?
11950
If temperature is dependent on mass, how did the early universe have a temperature?
115200
Why does energy have to be emitted in quanta?
139061
Why is 7 TeV considered as a big amount of energy?
58462
Impossibility of time travel due to energy conservation?
119336
Zero energy universe
49047
Redshifted Photon Energy
113659
Why was the universe in an extraordinarily low-entropy state right after the big bang?
130124
Is it possible to learn about an event that occurred outside of your observable universe?
41740
What is the evidence that dark energy exists? (as of 2020)
68027
Conservation of Energy vs Expansion of Space
45625
Is energy content of a system different depending on the observer?
110021
extracting energy from cosmological expansion
105342
How did Planck arrive at the idea that energy is quantized?
79708
Is the energy density of vacuum uniform in the whole universe?