A visualization of the polarization of the Cosmic Microwave Background, or CMB, as detected by ESA's Planck satellite over the entire sky. ESA and the Planck Collaboration hide caption

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The sun rises behind the cosmic microwave background (CMB) radiation telescopes at the National Science Foundation'€™s South Pole Station. Steffen Richter/Harvard University hide caption

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Cosmic microwave background radiation (CMB) as observed by Planck. The CMB is a snapshot of the oldest light in our Universe, imprinted on the sky when the Universe was just 380,000 years old. Planck Collaboration/ESA hide caption

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Science has been working to shed light on the nature of the Universe for 400 years. Alberto Pomares/iStockphoto.com hide caption

toggle caption Alberto Pomares/iStockphoto.com