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- Relativity and Galaxy Rotation Speed 2 answers
I'm doing research for a possible hard science fiction project and was looking up information on dark matter. Wikipedia--hardly an authoritative source, I know--mentions that the evidence for dark matter stems from an observation where galaxies were rotating around each other faster than what should be possible given visually observable mass.
Has there been an experiment or anything to try to explain the faster-than-expected rotation via Special Relativity? I mean, we're sitting inside of a gravity well looking at galaxies very far away, wouldn't the perception of time be different since we're sitting in a different gravitational field?
I'm absolutely not a physicist--just a layman asking a question to people who might have a better idea than me. Thanks.