Question

Galaxies look stationary, so why do scientists say that they rotate?​

Answer 1

Answer:

It's because galaxies are unimaginably huge. ... An object traveling at high speed across a very long distance appears to be moving slowly when viewed from far away. This is not a psychological effect.

Explanation:

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Answer 2

Answer:

It's because galaxies are unimaginably huge. An object traveling at high speed across a very long distance appears to be moving slowly when viewed from far away. This is not a psychological effect.

Explanation: