Before the Big Bang, the universe is believed to have been concentrated in an extremely small, hot, and dense state, often described as a singularity. This initial state had no defined size as we understand it, and all physical laws as we know them break down under these conditions. The expansion that followed the Big Bang marked the beginning of space and time as we know them, leading to the vast universe we observe today.
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The entire OBSERVABLE Universe must have been smaller than the size of a proton. Since the ENTIRE Universe is much larger, and perhaps infinite, we really don't know how large that was.
Nobody knows for certain what happened before the Big Bang exploded, or why it exploded when it did explode. Astronomers have determined much of what happened back to the Big Bang, but, Nobody knows anything, about what happened before the massive explosion that started the universe we live in now, and for the last billions of years. There are countless unanswered questions about the pre Big Bang universe that might never be answered.
Because the universe is so large, they need something like light to at least reach large amounts of distance.
According to the Big Bang theory, the universe was once a very hot and dense state, then rapidly expanded and cooled down over billions of years, leading to the formation of stars, galaxies, and other celestial bodies.
We have glaxies because our universe exploded.
The big bang all the matter of the universe was compacted in a very small thingy and then it exploded and we have the universe
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The most used expression is big bang.
According to the big bang theory the universe began about?
The first supernova was probably about 450 million years after the big bang, when the first, massive stars (Population III stars) exploded filling the Universe with the first heavy elements. These elements were "absorbed" by population II stars, which again exploded as supernovae. These metal enriched stars populated the Universe with the rest of the known elements. So supernova were around well before life on Earth. In fact without supernovae there would be NO life on Earth.
If Chuck Norris exploded there would be nothing left in the universe
Oxygen was created by fusion in the cores of stars and distributed through the universe when those stars exploded.
The " Big Bang "
Usually at the center of a galaxy or where a large star has exploded.
The main idea is that when the universe started out it was a hot clump of matter then it exploded into what we have today.
They exploded.