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James Webb Space Telescope

(future space-based 6.5 meter infrared telescope)

The James Webb Space Telescope (JWST) is a 6.5 meter (21 ft) NASA/European Space Agency/CSA space-based infrared telescope under construction, planned for launch in March 2021 (as of June 2018--the launch date has been delayed several times) to the Earth-Sun L2 Lagrangian point. Its lifetime will be limited by the fuel it carries and uses to keep it from straying from its orbit. A five-and-a-half-year program is targeted and a ten-year life is hoped for. Instruments:

One observation target is spectroscopy of extra-solar planets. NIRISS can operate in a mode termed SOSS, for single-object slitless spectroscopy, aimed at differential spectroscopy for observing the light curves of transiting exoplanets. MIRI offers medium-resolution (MRS mode, offering resolutions of 1500-3500) which is hoped to provide direct imaging of exoplanets. NIRSpec offers several gratings, with grating labeled G395 offering a spectral resolution of as much as 2700.

600nm500THz2.1eVbeginJames Webb Space Telescope
28.5μm11THz44meVendJames Webb Space Telescope

Referenced by:
Association of Universities for Research in Astronomy (AURA)
European Space Agency (ESA)
Goddard Space Flight Center (GSFC)
High Definition Space Telescope (HDST)
Korsch telescope
Lagrangian point
Origins Space Telescope (OST)
segmented mirror
Space Telescope Science Institute (STScI)
three-mirror anastigmat
Ultimate Spitzer Phase Curve Survey (USPCS)