JWST thermal vacuum chamber
JWST clean tent
JWST clean tent
Engineers at NASA's Goddard Space Flight Center in Greenbelt, Maryland, install the first of 18 segments that make up the James Webb Space Telescope's 6.5 meter primary mirror. Credit: NASA/Chris Gunn
JWST Program Scientist John Mather speaking at NASA Headquarters event in 2014 in front of an animation of the 6.5-meter infrared telescope. Photo Credit: NASA/Joel Kowsky
John Grunsfeld, NASA associate administrator for science. Credit: NASA/Aubrey Gemignani
After much tinkering, Northrop Grumman Aerospace Systems has at last finished the cryogenic cooler that will keep JWST's Mid-Infrared Instrument at its frosty-cool operating temperature of minus 270 Celsius. Credit: NASA artist's concept
Hubble Space Telescope. Credit: NASA
Backplane of James Webb Space Telescope
Northrop Grumman GAO interview graphic
NASA's James Webb Telescope's test backplane and mirrors
JWST mirror segments. Credit: NASA
JWST artist's concept

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