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A comment on The Reason We Haven’t Directly Detected Dark Matter. Parent comment

Re:The Reason We Haven’t Directly Detected Dark Matter by luxcem on Monday October 15, 2018 @10:35AM (#18219997)
As I understood it (I'm not a physicist so probably wrongly) dark matter is the proposed answer to reconcile General Relativity Theory (which is the current gravity theory) with actual observations of the universe.

So there is two possibilities:

- There is no dark matter and the general relativity is wrong.

- There is dark matter and the general relativity is correct.

And maybe a combination of both: there is something we don't detect but the theory is also wrong.

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Re:The Reason We Haven’t Directly Detected Dark Matter by perlgeek on Monday October 15, 2018 @11:17AM (#18220392)
It's not just General Relativity -- if there is no dark matter, the very Newtonian gravitational force having an 1/distance² relationship would need to be wrong on large scales.

However, no attempt at formulating a theory that propose a different long-range gravity than 1/distance² (and still reduces to the known behavior in the short range) has held up to observations.

(And with "short" I mean "on the scales inside our solar system", not meters).

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