the Big Bang
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8 Terms
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Everything in the cosmos started off as a
the universe started as a tiny, hot, dense point and has been expanding ever since
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In an instant
Everything expanded out from the universe
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all galaxies are
moving away from us (red shift)
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all galaxies are moving
closer to us (blue shift)
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all galaxies are moving
further apart from each other
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no stars are older than
13.8 billions years old
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as wavelengths increase
they become wider and vice versa
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cosmic background radiation is important because i
It’s leftover heat from the early universe, matching what scientists expected.
Note 
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