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James Webb Space Telescope Prepares for Launch

By Ernie Mastroianni
Jun 9, 2017 5:00 PMNov 18, 2019 11:04 PM
DSC-R0817 01 webb telescope
James Webb Space Telescope (Credit: NASA/Desiree Stover)


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Technicians at Goddard Space Flight Center in Greenbelt, Md., position the massive James Webb Space Telescope for tests in its assembly room earlier this year, in preparation for a 2018 launch. While Webb will be the most powerful space telescope ever built, astronomers are already designing its successor. The High Definition Space Telescope will have a mirror nearly twice the diameter of Webb’s 21.3-foot gold mirror and should be powerful enough to detect evidence of life on alien planets. 

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