Biology, 10.12.2020 20:30, kaliyab191

What does it mean if a galaxy gives off light that has been shifted toward the red end of the electromagnetic spectrum? A The galaxy is much older than Earth. B The galaxy is moving away from Earth. C The galaxy is very hot and has not cooled down yet. D The remnants of an explosion are between the galaxy and Earth.

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What does it mean if a galaxy gives off light that has been shifted toward the red end of the electr...