This page provides links to find out more about JWST's science instruments and how they compare with HST's science instruments.

Observing modes with JWST

JWST is equipped with four science instruments sensitive over a wide wavelength range from the optical to the mid-infrared (0.6–28 μm). Use the graphic to explore the observing modes and identify those most suitable for particular science observations; learn about the imaging and spectroscopic capabilities offered; or navigate directly to the science instrument webpages highlighted below.

JWST science instruments

A top-level summary of the instruments' technical capabilities is provided in the JWST Pocket Guide. More detailed technical information can be accessed from the links below, or from the left sidebar.

Mid-Infrared Instrument (MIRI)

Near-Infrared Camera (NIRCam)

Near-Infrared Imager and Slitless Spectrograph (NIRISS)

Near-Infrared Spectrograph (NIRSpec)

Next: Proposal Types, Sizes and Science Areas