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-   -   Fabulous projects for the study of dark matter and dark energy (http://www.physicsforums.com/showthread.php?t=281476)

giann_tee Dec25-08 10:55 AM

Fabulous projects for the study of dark matter and dark energy
 
The most relevant observation to date regarding dark matter is "Bullet cluster".

"The Bullet cluster (1E 0657-56) consists of two colliding clusters of galaxies.[1] Studies of the Bullet cluster, announced in August 2006, provide the best evidence to date for the existence of dark matter.[2] At a statistical significance of 8σ, it was found that the spatial offset of the center of the total mass from the center of the baryonic mass peaks cannot be explained with an alteration of the gravitational force law.[3] Observations of other galaxies cluster collisions, such as MACS J0025.4-1222, also show significant displacement between their center of visible matter and their gravitational potential."
http://en.wikipedia.org/wiki/Bullet_Cluster


Major contribution to the study of dark energy was published recently.

"A team led by Alexey Vihklinin (Smithsonian Astrophysical Observatory) has discovered that very ancient galaxy clusters are much more massive than those that formed more recently. "What we find is that the growth of these structures has slowed down during the past 5 billion years," Vihklinin explains, "and this is the unmistakable signature of dark energy.""
http://www.skyandtelescope.com/commu.../36372969.html


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