- #1
nhmllr
- 185
- 1
Okay, so I understand that galaxies spin more like a frisbee than the solar system, and that there is evidence for a lot of non-light-emitting mass (such as gravitational lensing) but how would dark matter account for the difference in the spin of galaxies? Gravity still decreases inverse to the square of the distance, right? And also, why wouldn't dark matter have an effect on the solar system, where pluto would orbit in one Earth year?