NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
James Webb Space Telescope (JWST), computer illustration. This infrared telescope is scheduled to be launched in 2018. It will have a 6.5-metre-diameter mirror (yellow), with which it will study the formation of stars and planetary systems, and the history of the universe. By using infrared wavelengths, the JWST will be able to see through much of the dust that obscures visible light. It will also study dark matter, which is thought to form the majority of the matter in the universe.
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