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Dark Matter Could Color Our View of the Universe

A photograph of the Cat's Paw Nebula, known for its reddish puffy shape of glowing gas against a star-filled background. Credit: ESO/R. Gendler and R.M. Hannahoe

Dark matter could tint light passing through it, depending on the model. While the effect is tiny, it is just on the edge of our ability to detect it.



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