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Old 08-20-2010, 09:52 AM
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Default New method of detecting dark energy discovered

Analysing the sublte effects dark energy has on gravitationally bent light [photo below], allows cosmologists to probe the nature of dark energy on huge distances and timescales to learn of its behaviour in the Universe.



This is considered a step towards solving the Universe's (second) biggest mystery; how it will end. Knowing the nature of dark energy is knowing the fate of the Universe; Big Rip or Big Chill; both are still possible.





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Old 08-20-2010, 02:07 PM
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Nice, interesting way to do it I think, predicting the dark energy based on gravity.
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Old 08-20-2010, 10:02 PM
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Hmmm, I thought gravitational lensing occurs from the presence of black holes or quasars. I'm not sure if dark matter is that dense.
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Old 08-20-2010, 10:35 PM
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Gravitational lensing occurs in galaxy clusters with mass many times greater than the largest black holes or quasars. The largest black holes have a mass of around 20 million stars. Each galaxy in Abell 1689 has at least 100 million stars in it so it's gravity as a whole is much much greater than that of a black hole.

The majority of this gravity comes from the dark matter halo enveloping the cluster which is strong enough to noticeable bend the light of objects behind the cluster.
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Old 08-21-2010, 02:43 AM
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Quote:
Originally Posted by Dreaming Of Pandora View Post
Analysing the sublte effects dark energy has on gravitationally bent light [photo below], allows cosmologists to probe the nature of dark energy on huge distances and timescales to learn of its behaviour in the Universe.



This is considered a step towards solving the Universe's (second) biggest mystery; how it will end. Knowing the nature of dark energy is knowing the fate of the Universe; Big Rip or Big Chill; both are still possible.





Reminds you of how awesome space is.

Also reminds you how good our singers are.
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