What is the universe inside of?

Question

if the universe was once the size of an atom what was it inside of ?

Answer 1

This is probably the most asked question about the universe. The answer is: We don't know but we believe that everything: time, space, matter and energy is expanding with the universe.

Of course, it is not easy to think of something inside nothing but you have to understand that the universe cannot be seen as you see an object in your house. Space has no absolute point of reference. All you see is in both space and time and therefore there is no simultaneity: What you see is not what it is: the sun is what it was 8 minutes ago and far away galaxies, what they were billion of years ago.

Answer 2

a demention

Answer 3

We think it's dark matter. We just don't know.

Answer 4

The Universe was never the size of an atom.  Perhaps everything in the current visible Universe expanded from a volume about the size of an atom, but the Universe at the time must have been at least as large as the current visible Universe. So, the current Universe must be at least really big.

When it was really dense and hot, there was a plasma of dissociated sub atomic particles. The details are still being worked out.  The next round of research will take place in the Large Hadron Collider, which should get turned on in less than a month.

Answer 5

Quarks, Protons, Neutrons - fundamental building blocks of matter itself was contained inside that atom. The particle was actually thousands of times smaller than an atom.

Answer 6

Inside the charm of a collar worn around a galactic kitties neck....

Answer 7

No the universe was not once the size of an atom....

It was the size of nothing. Before the Big Bang there was only energy, which takes up no space, not even the amount of space in an atom. Just nothingness. There wasn't a shell or anything. There is no limit to the universe. If we were next to the end of the universe, we could travel past it. It is not a barrier, just the point where there is only space and no matter.