What's our Best Guess on How the Universe is Expanding?

I understand why its accelerating in expansion ('understand' as in understand what we've reasoned so far) but what's our best guess on how the universe originally expanded? Are vacuum fluctuations a possibility?

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Paschar · 70-79, M

It all started off with the big bang and has been moving outward ever since

Animore · 26-30, M

And I realize that, but what's our idea on how that originally kickstarted? Do we think there was a kickstart event, and was it possible this was a quantum vacuum fluctuation?

Paschar · 70-79, M

@Animore: Nope , Just one big blast of atoms , quantum vacuum fluctuation does not apply to E = Mc2

Animore · 26-30, M

@Paschar: Well yeah but that's exactly my point. We know they exist, and that they can create energy out of nothing. We can observe them at Hawking radiation as well, so wouldn't it be possible?

Paschar · 70-79, M

@Animo[media=https://www.youtube.com/watch?v=wNDGgL73ihY]

Animore · 26-30, M

@Paschar: I don't need an explanation, thank you, I understand the concept of the expansion of the universe. I wish for an answer to my question.