What is the initial force of universe expansion?

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SUMMARY

The initial force driving the expansion of the universe at the Big Bang was primarily due to the immense energy released during this event. Dark energy becomes a significant factor in the expansion only after the universe has begun to accelerate, which occurs much later in cosmic history. Wallace, a Science Advisor, provides clarity on this topic in post #6 of the referenced Physics Forums thread. Understanding the transition from the initial expansion force to the influence of dark energy is crucial for comprehending cosmic evolution.

PREREQUISITES
  • Understanding of Big Bang cosmology
  • Familiarity with the concept of dark energy
  • Knowledge of cosmic expansion and acceleration
  • Basic principles of general relativity
NEXT STEPS
  • Research the role of dark energy in cosmic acceleration
  • Study the implications of general relativity on cosmic expansion
  • Explore the evidence supporting the Big Bang theory
  • Investigate current theories on the fate of the universe
USEFUL FOR

Astronomers, physicists, and anyone interested in cosmology and the fundamental forces shaping the universe's expansion.

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When the universe started expanding at the big bang, was it mainly driven by the force of the big bang ? Does dark energy start to play the major role in driving the expansion only when it is accelerating?

(I would prefer to have this question answered by a PF Science Advisor or someone who actually knows about it.)
 
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