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HunkyMump t1_iu9894h wrote

Reply to comment by elite4koga in Is dark matter orbiting galaxies with the same speed as normal matter? by taracus

A side question: because dark matter interact with gravity, can we then infer that dark matter particles that do interact with gravity, are limited to the speed of light in the same way regular matter does?

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Fewluvatuk t1_iu9dxfd wrote

We don't have to assume. The speed of causality applies to everything in the universe regardless of its properties.

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