Mission Overview

mission wavelength

Wavelength Coverage

mission coverage

The JWST Mid-Infrared Instrument (MIRI) provides imaging and spectroscopic observing modes in mid-infrared wavelengths. These wavelengths can be utilized for studies including (but not limited to): direct imaging of young warm exoplanets and spectroscopy of their atmospheres; identification and characterization of the first galaxies at redshifts > 7; and analysis of warm dust and molecular gas in young stars and proto-planetary disks.

Active From

(Launch dates TBD)


Varies by Observing Mode:  see Table 1 for details: MIRI Modes

  • Pixel Scale: ~0.11"/pixel
  • Resolution: ~100 (low spec) ; ~1550-3250 (medium spec)
  • FWHM: ~2 pixels @ 6 um


On this Page

Search Tools

MAST Portal

Search multiple missions using target names or coordinates.


Tools for programmatically querying the MAST Portal

Simulated Data

Simulated data from the MIRI instrument team hosted @ESA

Primary Documents

Image Gallery


The detector layout schematic for JWST MIRI.

JWST MIRI Spectrometer

A schematic view of the JWST MIRI Spectrometer. (Image courtesy JDox.)


A schematic view of the JWST MIRI Imager. (Image courtesy JDox.)

JWST MIRI in Development

JWST MIRI during ambient temperature alignment testing in RAL Space's clean rooms at STFC's Rutherford Appleton Laboratory, 8th November 2010.  (Image courtesy NASA, Science and Technology Facilities Council (STFC).)

JWST MIRI in Development

Contamination control engineers conduct a "receiving inspection" of JWST MIRI in the giant clean room at NASA's Goddard Space Flight Center in Greenbelt, MD.  (Image courtesy NASA/Chris Gunn.)

JWST MIRI in Development

Goddard Technicians guide the craned structure holding the Webb telescope's MIRI Shield Environmental Test Unit into place in a cryogenic (cooling) test chamber.  (Image courtesy NASA/Rob Gutro.)

JWST MIRI in Development

Engineers work meticulously to implant JWST MIRI into the ISIM, or Integrated Science Instrument Module, in the cleanroom at NASA's Goddard Space Flight Center in Greenbelt, MD.  (Image courtesy NASA/Chris Gunn.)

External Links