# Will the universe collapse back into itself?

No, it will expand forever.

The ratio, known as omega, between dark energy, which drives the expansion of the universe, and material that is gravitationally attracted to one another and tends to cause the universe to collapse will determine whether the universe collapses in on itself or continues to expand indefinitely. If the ratio is greater than one, the universe will collapse in one. If it is less than one, the universe will collapse in one.

The most recent best estimate, omega > 1, is based on data from distant galaxies and the cosmic microwave background.

This implies that there will be a "heat death" of the universe, in which the energy density of the universe will drop to zero and it will become vast and chilly.

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The universe appears to be expanding faster than it was previously thought, which reduces the likelihood of a collapse. Nevertheless, there is still uncertainty about the universe's ultimate fate, and research is still being done to investigate different possibilities.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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