[MyTwoCopperCoins]

I thought they had evidence of Dark Matter based on its effects on light that mimicked gravity.

[BornToBeAmerican]

Well this theory poses a huge problem. If dark matter poses a negative effect on light as I have heard suggested then the Universe MUST be younger than previously thought. There is no dark matter between the Earth and the Sun and they have measured the speed of light between the two. However, if dark matter slows light is it not feasible, that given enough distance, light would actually stop.

For example, a yellow-orange sun called Chara is 26 light years from the sun. If it takes 26 light years and we have dark matter having a negative effect on it. Would it not be possible that with out it, the light would only need 20 light years, perhaps only 10.

This would of course provide more problems than they are trying to solve.