How can the Big Bang happen everywhere?

The Big Bang happened everywhere at once. The universe has no center or edge, and every part of the cosmos is expanding. That means if we run the clock backward, we can figure out exactly when everything was packed together—13.8 billion years ago.

Did the Big Bang happen everywhere at once?

So the Big Bang happened everywhere at once, 13.8 billion years ago, and our Universe is spatially flat to the best we can measure it at present. The Big Bang did not happen at a point, and the way we can tell is through the extraordinarily high degree of isotropy and homogeneity of the Universe.

How did the Big Bang happen from nothing?

Instead of extrapolating “hot and dense” back to an infinitely hot, infinitely dense singularity, inflation basically says, “perhaps the hot Big Bang was preceded by a period where an extremely large energy density was present in the fabric of space itself, causing the Universe to expand at a relentless (inflationary) …

How can the universe be infinite if there was a Big Bang?

Although space may have been concentrated into a single point at the Big Bang, it is equally possible that space was infinite at the Big Bang. In both scenarios the space was completely filled with matter which began to expand. There is no centre of the expansion, the universe is simply expanding at all points.

What is outside the Universe?

To answer the question of what’s outside the universe, we first need to define exactly what we mean by “universe.” If you take it to mean literally all the things that could possibly exist in all of space and time, then there can’t be anything outside the universe.

Do galaxies expand away from each other equally?

Since all the galaxies are moving away from us, then they must all be moving away from each other. This is explained if the Universe, as a whole, is expanding. The galaxies are not moving, the space between them is literally expanded.

Will space ever stop expanding?

This suggests that the universe began very dense about 13.787 billion years ago, and it has expanded and (on average) become less dense ever since. There is a strong consensus among cosmologists that the shape of the universe is considered “flat” (parallel lines stay parallel) and will continue to expand forever.