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Gravitational Lensing Effect by Dark Matter

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Uploaded by on Jul 31, 2008

This animation shows how weak gravitational lensing effects from dark matter changes the path of light then distorting the shapes of distant background galaxies. Note how the shape of the galaxy changes from round to elliptical. The map was created by using this technique, and analyzing the distorted shapes of half a million distant galaxies. Such subtle distortions were then used to reconstruct the mass distribution along Hubble's line of sight. The data from the COSMOS project is used to create a 3D map of Dark Matter.

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  • I am new to this sort of thing is my understanding correct here? if a photon is traveling a C, then for that photon no time is passing as it travels, then it can not be effected to have it's vector changed? there for photon must still be traveling in what its "sees" as a straight line. yes/no? explain?

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