The origins of the universe

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The origins of the universe

The expanding universe

Light from a distant galaxy is red-shifted to longer wavelengths.

The most distant galaxies are about 13000 million light years away.

The universe is expanding.

The big bang

The universe started with the big bang, a massive explosion from a very small point.

Background microwave radiation is radiation created just after the big bang.

Looking into space

The earths atmosphere absorbs

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