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November 29, 2011

Proving The Existence Of Dark Matter Takes A Hit

Dark Matter is believed to be the large amount of undetectable mass that accounts for much of the total mass of the galaxy. Due to the fact that the orbital velocities of stars and gas clouds in galaxies nearly remain constant as their distance from the center of the galaxy increases, Newton's laws of graviton and motion tell us that the total mass of the galaxy is much larger than just the mass of the stars.

Although we believe we have evidence of dark matter, the existence of dark matter is has not yet been officially proved. One of the tests scientists used to predict dark matter was to monitor the positron signal, which should suddenly drop off in cosmic rays beyond a certain energy level. However this was not the case for researchers with the Kavli Institute for Particle Astrophysics and Cosmology at Stanford University in Palo Alto, California, who detected no drop-off. This result certainly does not prove that dark matter doesn't exist, but is inconclusive.

Source:
http://www.astronomy.com/en/News-Observing/News/2011/11/One%20promising%20puzzle%20piece%20for%20confirming%20dark%20matter%20now%20seems%20unlikely%20fit.aspx

Posted by koransky at November 29, 2011 05:22 PM

Comments

Wow, this is really interesting. I'm actually surprised to hear that dark matter has not really been proven yet. I just kind of assumed that it was because I've heard so much about it in astronomy. Thanks for the post on this.

Posted by: nzingas at November 30, 2011 10:20 PM

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