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4 Dec 2021
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Astronomers hope to determine whether the universe used to expand faster than it .
Step-by-step explanation
Step 1.
The red shift is used to calculate the distance between galaxies. The distance between galaxies increases as the red shift between them increases. Some very far away objects emit high-energy wavelengths.
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922