What is the initial force of universe expansion?

In summary, the initial force that caused the universe to expand is known as the Big Bang, which occurred approximately 13.8 billion years ago. Scientists use methods such as observing cosmic microwave background radiation to measure the initial force of universe expansion. This force is not constant and is believed to be accelerating due to the mysterious force known as dark energy. While its exact role is still being studied, it is unlikely that the initial force of universe expansion can be reversed due to the fundamental laws of physics.
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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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FAQ: What is the initial force of universe expansion?

What is the initial force that caused the universe to expand?

The initial force that caused the universe to expand is known as the Big Bang. This event is believed to have occurred approximately 13.8 billion years ago and is thought to have been triggered by a rapid expansion of space and time.

How do scientists measure the initial force of universe expansion?

Scientists use a variety of methods to measure the initial force of universe expansion. One of the most common methods is to observe the cosmic microwave background radiation, which is a remnant of the Big Bang. By studying the properties of this radiation, scientists can estimate the initial force of universe expansion.

Is the initial force of universe expansion constant?

No, the initial force of universe expansion is not constant. In fact, it is believed that the expansion of the universe is accelerating, which means that the force driving this expansion is increasing over time.

What role does dark energy play in the initial force of universe expansion?

Dark energy is a mysterious force that is thought to make up a large portion of the universe. It is believed that dark energy is responsible for the accelerating expansion of the universe. However, its exact role in the initial force of universe expansion is still a topic of ongoing research and debate among scientists.

Can the initial force of universe expansion be reversed?

Based on current scientific understanding, it is unlikely that the initial force of universe expansion can be reversed. The expansion of the universe is thought to be driven by dark energy, and reversing this force would require a significant and unprecedented change in the fundamental laws of physics.

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