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Archive - Aug 30, 2008

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Galactic clash unmasks dark matter: ordinary mater and dark matter separate as two massive galaxies collide

collision of clusters from the Hubble Telescope and Chandra Observatory

(quote)

Striking evidence has been found for the enigmatic "stuff" called dark matter which makes up 23% of the Universe, yet is invisible to our eyes. The results come from astronomical observations of a titanic collision between two clusters of galaxies 5.7 billion light-years away. Astronomers detected the dark matter because it separated from the normal matter during the cosmic smash-up. The research team are to publish their findings in the Astrophysical Journal.

They used the Hubble and Chandra space telescopes to study the object MACSJ0025.4-1222 - formed after an incredibly energetic collision between two large galaxy clusters. Each of these large clusters contains about a quadrillion times the mass of our Sun.

the Large Hadron Collider, a massive particle detector, in its cavern below France read more »

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