How is the mass of the universe determined?
Jonathan AvilaIndirectly
There are two ways: add all masses of everything you see such as stars, clouds. Observe the rate of of the universe. Deduce its mass. Both methods disagree by a factor of ten. There is ten times more mass than we see. The missing part is dark matter.
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Isaac AbelThe mass of the universe is estimated through observations of cosmic microwave background radiation and the distribution of galaxies, combined with theoretical models.
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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.
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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