I observe a galaxy that is 100 million light years away. Which of the following do I see?
A) the light from the galaxy as it is today, and it is redshifted
B) the light from the galaxy as it was 100 million years ago, and it is redshifted
C) the light from the galaxy as it is today, and it is blueshifted
D) the light from the galaxy as it was 100 million years ago, and it is blueshifted
E) Nothing: the galaxy lies beyond the cosmological horizon.
Correct Answer:
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