If there is no absolute time, how can we say the Big Bang was 13.8 billion years ago?
41750
The age of the universe
25938
Before the Big Bang
81495
Does the universe have a different age to different observers?
131384
understanding time: Is time simply the rate change?
25827
Does time expand with space? (or contract)
91265
Has the speed of light changed over time?
81212
Is there really time reversibility in physics?
15715
How can the Schwarzschild radius of the universe be 13.7 billion light years?
99342
Given that matter cannot escape a black hole, how did the big bang produce the universe we see today?
9937
Does time freeze at Absolute Zero?
29426
Is there a proof of existence of time?
84790
Can I measure a journey time < 100 years on a 100 light year voyage?
4942
What is the relationship between Cosmic Time and Scale Factor (or Redshift)?
36619
Effect of space time relativity on the age of the universe?
113249
Does time exist in a vacuum?
73729
Calculating the age of the Universe now and 30 billion years from now
105171
Does time pass fastest in isolated, resting space?