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From what I've researched dark matter isn't subject to electromagnetic forces, which I'm assuming implies that there is a lack of electromagnetic repulsion between dark matter particles.

If there's nothing to repel them, then shouldn't they clump up together and form a black hole?

raid6n
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  • Why should they clump? Consider conservation of energy, as applied to gravitational potential energy and kinetic energy. See https://en.wikipedia.org/wiki/Specific_orbital_energy – PM 2Ring Jul 18 '23 at 07:02
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    Does this answer the question? https://physics.stackexchange.com/q/214950/180843 – Sten Jul 18 '23 at 07:03

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