Tuesday, August 22, 2006

Dark matter is real!

This is incredible - dark matter is really out there! I don't understand all the reasons scientists have inferred this, but as far as I can make out, they can tell because two galaxies have collided & swept away the usual debris of ordinary matter. Usually their gravitational fields would point at all the matter, ordinary & dark, which doesn't answer any questions, but now that the ordinary matter is out of the way, & the field is still pointing at something, it must be the dark matter. (See here & here for much better explanations.) I love that despite the complete nonsense many people believe in, such as creationism, intelligent design, geocentrism, etc., there are still scientists out there trying to find the truth. Now, if they could just explain it in a way that sticks in my brain. :)

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