The Dark Matter Mystery: Gravitational Lensing
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The Mystery of Dark Matter (3/4): Gravitational Lensing. A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, ... (more)
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Tags: dark matter energy gravitational lensing galaxies mass stars speed universe science quasar clusters einstein general theory of relativity gravity warped space time

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