Here is a simple solution to this conundrum that does not require anything other than garden-variety Gravitation.

The reason why this was a conundrum for 90 years is the subconscious decision to think of a flat distribution of matter as a spherical distribution of matter.

That approximation is not valid. One cannot use Newton's Shell Theorem to place all the matter into a single point and then use Keplerian Dynamics-based reasoning.

So, it has been a very long-lasting mistake... an error of judgment.

I stated the problem in stark terms because I want to see opposing views (and learn from them).

Please, join the conversation and bring your best argument to defend Dark Matter, Dark Energy, and the Status Quo.

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