Friday, February 3, 2012



einstein cross

einstein cross
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einstein cross

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einstein cross

The Einstein Cross Gravitational Lens

by Father Sky

Most galaxies have a single nucleus -- does this galaxy have four? The strange answer leads astronomers to conclude that the nucleus of the surrounding galaxy is not even visible in this image. The central cloverleaf is rather light emitted from a background quasar. The gravitational field of the visible foreground galaxy breaks light from [...]

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