First Empirical Detection of Dark Matter

August 21, 2006 at 10:48 am | | nerd, news

Well, after giving everyone a taste of what is to come today, NASA has finally let the cat out of the bag. During the observation of a collision between a pair of clusters, the observers were able to resolve the separation of baryonic and non-baryonic matter by comparing the luminous and gravitational profiles.

I spy CDM


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  1. non-baryonic matter makes me hungry.

    Comment by william — August 21, 2006 #

  2. What’s going to happen to Modified Newtonian Dynamics (MOND) theory? MOND is an alternative theory to the galaxy rotation problem. (The arms of galaxies don’t spin at the expected speed.) Positing dark matter is the popular way to solve the problem. But MOND has a really pretty equation that tweaks F=MA when gravity gets funky, and the tweaked equation holds up nicely to observation, according to a recent article in Discover Magazine. The problem with MOND is that there’s no good physical reason it should be true, which makes it somewhat unpopular in astrophysics circles. Check out .

    Comment by jordan — August 22, 2006 #

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