What observational evidence supports the fact that our universe is expanding?
Luke AllenIn 1920 Edwin Hubble photographed different galaxies and studied their spectrum.
He found the red shifts of galaxies and for more distant galaxies showing higher red shifts..This is the proof of expansion of universe.
Later type Ia supernovas were studied and they show that the universe is not only expanding but accelerating.Cosmologists assume that it is due to dark energy..
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Leah AbbateThe cosmic microwave background radiation, the redshift of far-off galaxies, and the universe's galaxy distribution all provide observational evidence for the expansion of the universe.
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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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