You need more than this. The alternative is modified gravity, meaning gravity rules are different at different scales. Most people arguing against dark matter u

You need more than this. The alternative is modified gravity, meaning gravity rules are different at different scales. Most people arguing against dark matter use that one example as their battle ground, aha, I can get the same result with just a tweak to Newton's laws. It's when you add in all the other problems that a little tweak to Newton's won't be enough.