Notes:
1. I'm in 8th grade so i don't have in-depth schooling on this. Lengthier explanations with more extra information that would improve understanding would be much appreciated.
2. I asked a question on this topic earlier so this is an expansion of it.
3. English isn't perfect yet, so if anyone can give either Russian, Arabic, or Mandarin translations of complex terms, this would also help very much.

Many of the responses mentioned the big bang, and I thought that maybe it's continuous expansion, if the expansion is throughout and not new mass added on the edge of expansion, is this what balances out gravity? And if so, can its rate of movement (due to the loss of energy over time) decrease to a point that gravity overpowers it, and all mass would collapse in on itself?