Is dark matter finally real?

SpaceNews24 and UA report that scientist from the University of Arizona found an evidence that dark matter really exists after all.They used Hubble and Chandra to observed two star-clusters – a 100-million-light-years away and therefore and event which is exactly as old – colliding. They actually found a difference in mass observed by the two telescopes; after analyzing the effects of gravitational-lenses shown in Hubble’s pictures they concluded that there’s dark matter out there:

“The bottom line is, there really is dark matter out there, now we just need to figure out what it is.” — Dennis Zaritski

galaxy cluster 1E0657-556

This composite image shows the galaxy cluster 1E0657-556, also known as the “bullet cluster”, formed after the collision of two large clusters of galaxies. Hot gas detected by Chandra is seen as two pink clumps in the image and contains most of the “normal” matter in the two clusters. An optical image from Magellan and the Hubble Space Telescope shows galaxies in orange and white. The blue clumps show where most of the mass in the clusters is found, using a technique known as gravitational lensing. Most of the matter in the clusters (blue) is clearly separate from the normal matter (pink), giving direct evidence that nearly all of the matter in the clusters is dark. This result cannot be explained by modifying the laws of gravity. (IMAGE CREDIT: X-ray: NASA/CXC/M.Markevitch et al. Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al. Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/D.Clowe et al. – Text by University of Arizona)

We’re living in interesting times; the idea of dark matter is more sexy than modifying the laws of gravtitation gravity… :-)

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One Response to Is dark matter finally real?

  1. Lance Knoechel says:

    Being only a layman with an interest in the subject, I’m not even sure how to present an idea on dark matter that I’ve had for a very long time. But in a nutshell:

    Dark matter is merely anti-matter. As anti-matter, it creates anti-gravity and other forms of anti-energy. It seems that an anti-matter universe exists in a commingled way with our material universe. There are anti-stars, anti-planets, anti-galaxies, even anti-light. The reason we cannot see the ‘dark matter’ is because gravity and anti-gravity will ‘push’ against each other as opposed to ‘pull’. Even anti-light approaching earth would be pushed away by the gravity of our galaxy, sun, earth and even ndividual atoms. Even if some form of anti-radiation were to reach our region of matter and actually come into full contact, it would be annihilated. The meeting of matter/energy and anti-matter/anti-energy would simply cancel each out of existence. This is largely avoided due to the repulsion of the two opposing forms of matter.

    The idea of anti-matter and, therefore, anti-gravity, may be a possible explanation for the continued expansion of the universe.

    Any comments on this line of thinking would be greatly appreciated.

    Lance Knoechel
    lknoechel@cinci.rr.com

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