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The evolution of a galaxy is affected by collisions -- the interactions of regular matter. Dark matter doesn't interact with itself in the same way. That's ex
by dm_throwaway 12y ago
The evolution of a galaxy is affected by collisions -- the interactions of regular matter. Dark matter doesn't interact with itself in the same way. That's exactly what this article is about!
(I don't know what's wrong with people that they think that, somehow, the entire astrophysics/cosmology community has been too stupid to think these fairly simple things through. If there was an obvious flaw in these models, a researcher would have a large incentive to point these out and get the citations!)
- phkahler 12y ago>> I don't know what's wrong with people that they think that, somehow, the entire astrophysics/cosmology community has been too stupid to think these fairly simple things through. Because they are: http://www.csmonitor.com/Science/2015/0412/Universe-s-expansion-may-not-be-accelerating-as-much-as-thought-say-scientists http://www.csmonitor.com/Science/2015/0412/Universe-s-expans... So the whole dark energy thing hinges on measurements of distances to galaxies, which in turn depend on this notion that supernovas are all the same. The entire community would rather embrace an exotic hard to prove concept than go back and look at older assumptions. And I kid you not about Keplers Laws being used too often when they don't apply. But that's my usual story.