What evidence is there that the universe is expanding?

Science
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What evidence is there that the universe is expanding?

May 11th, 2014

 The strongest evidence for an expanding universe comes from the cosmological redshift. A redshift is a change in the spectrum of light as the distance between the source and the observer of the light increases. Such a redshift has been seen in the spectrum of light from distant stars. This means that the distance between those stars and the Earth is increasing, indicating an expanding universe

May 11th, 2014

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May 11th, 2014
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May 11th, 2014
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