EUROPEAN SPACE AGENCY / NASA, C. GUNN / SCIENCE PHOTO LIBRARY EUROPEAN SPACE AGENCY / NASA, C. GUNN / SCIENCE PHOTO LIBRARY
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James Webb Space Telescope inspection, time-exposure image. After completion of its vibration and acoustic testing in March, the James Webb Space Telescope (JWST) underwent a detailed 'lights out' inspection. This is a visual inspection to check for any forms of contamination, using white LEDs and ultraviolet (UV) lights. The JWST is an infrared telescope that is scheduled to be launched in 2018. 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, thought to form the majority of the matter in the universe. The JWST is scheduled for launch in October 2018. Photographed in March 2017.
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