spacer link to MAST page spacer logo image spacer
link to STScI page

James Webb Space Telescope

James Webb Space Telescope (JWST) features a 6.5 meter segmented primary mirror and 4 science instruments, each of which offers a variety of configurations and operating modes for infrared observing. Launch is planned for spring of 2019, with science operations commencing a few months hence.

Artist Rendition (NASA)

JWST in Orbit - Artists Rendition (NASA)

Science Instruments

  • Mid-infrared instrument (MIRI)
    • imaging in 9 photometric passbands from 5—28 μm
    • low-resolution slit/slitless spectroscopy from 5—12 μm
    • medium-resolution IFU spectroscopy from 4.9—28 μm
    • 4-quadrant phase-mask and Lyot coronography, in multiple passbands
  • Near-Infrared camera (NIRCam)
    • simultaneous imaging in two 2.2' square fields in two passbands jointly covering 0.6—5.0 μm
    • coronographic imaging in multiple passbands in the 1.8—5.0 μm range
    • wide-field slitless spectroscopy in the 2.4—5.0 μm range
    • time-series imaging in two passbands jointly covering the range 0.6—5.0 μm
    • time-series spectroscopy of bright sources from 2.4—5.0 μm
  • Near-Infrared Spectrograph (NIRSpec)
    • multi-object spectroscopy over a 3.6'×3.4' FoV from 5—28 μm
    • IFU spectroscopy over a 3"×3" FoV from 0.6—5.3 μm
    • high-contrast, single-object spectroscopy from 0.6—5.3 μm
    • high-throughput, time-resolved spectroscopy from 0.6—5.3 μm
  • Near-Infrared Imager and Slitless Spectrograph (NIRISS)
    • wide-field, slitless spectroscopy over a 2.2' square FoV from 0.8—2.2 μm
    • time-resolved, slitless spectroscopy from 0.6—2.8 μm
    • high-contrast aperture-mask interferometry in 4 passbands from 2.4—5.0 μm
    • imaging in 12 passbands from 0.8—5.0 μm