Question

In the 1920s, Edwin Hubble looked at the spectra of stars from distant galaxies. To his surprise, he found that all of these spectra were red-shifted, and that the more distant the galaxy, the greater the red-shift. What is a reasonable conclusion from this evidence? A. The universe is expanding. B. The universe is contracting. C. The universe is unchanging. D. The universe is curved.

Answer 1

Answer: the universe is expanding

Step-by-step explanation:

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Answer 2

D. The universe is curved.

Step-by-step explanation:

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