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7 votes
Which of the following supports the theory that the Universe is expanding?

A
Redshift of light from distant galaxies

B
Blueshift of light from distant galaxies

C
Nuclear fusion occurring in the Sun

D
Radioactive decay occurring in the Sun

2 Answers

12 votes
A, redshift I’d galaxies, because it shows they are moving away
User Edwyn
by
8.9k points
2 votes
Blueshift of lights from distant galaxies
User Blomster
by
8.0k points
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