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clinden
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What do we know or speculate as to the size of the visible and entire universe between the Planck time and the beginning of explosive inflation?
marcus said:Some parts you will be able to get the idea, some parts will seem opaque and impossible---too technical. As long as you think it can help, ask questions about the paper here---I don't understand as much as some of the others but I can try, and others may try, to answer.
clinden said:... 2 questions;
1 There was no discussion of entropy pre/post bounce. Any comment on this?
2 How has the paper been received by both bounce and non-bounce mavens?
The size of the universe at the Planck time is incredibly small, estimated to be around 10^-35 meters. This is the smallest possible unit of length and represents the very beginning of the universe.
The size of the universe has undergone significant changes since the Planck time. During the inflationary period, which occurred within the first second after the Big Bang, the universe expanded rapidly to about 10^26 meters. It has continued to expand since then, but at a much slower rate.
The current estimated size of the observable universe is around 93 billion light-years in diameter. This is based on the most recent data from the Planck satellite and takes into account the expansion of the universe.
The size of the universe is much larger than the age of the universe. The observable universe has a diameter of 93 billion light-years, while the age of the universe is estimated to be around 13.8 billion years. This is because the universe has been expanding since the Big Bang.
The size of the universe is currently unknown and may be infinite. The observable universe is limited by the distance that light has had time to travel since the Big Bang, but the actual size of the universe may be much larger. Scientists are still studying this question and trying to gather more data to understand the size of the universe.