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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SW-User

Oh that is such a high-class question compared to many on here. Thank you! As for the answer, I ascribe it to the Goddess beginning to dance, but I think you were looking for something more sciency :)

Animore · 26-30, M

Well, thank you, ha ha. :)