PROJECT SITE:

You are here!

Official site of the design, build, test and launch of JWST.

SCIENCE SITE:

webbtelescope.org

JWST Science overview, future home of science data and images.

NASA HQ SITE:

www.nasa.gov/jwst

Overview of the spacecraft, mission and science of JWST.

JWST related content on the NASA HOME PAGE plus links to NASA’s other great activities and missions.

MISSIONS:

JWST related Missions.

MORE NASA:

News, Careers, Locations & more.


Fine Guidance Sensor/Near InfraRed Imager and Slitless Spectrograph (FGS/NIRISS)

Status:

The Fine Guidance Sensor (FGS) allows Webb to point precisely, so that it can obtain high-quality images.

All four flight science instruments were integrated into the ISIM structure by March 2014.

JWST Team Photo with Completed Flight Instrument module

Learn More About FGS/NIRISS:

The Near Infrared Imager and Slitless Spectrograph part of the FGS/NIRISS will be used to investigate the following science objectives: first light detection, exoplanet detection and characterization, and exoplanet transit spectroscopy. It has a wavelength range of 0.8 to 5.0 microns, and is a specialized instrument with three main modes, each of which addresses a separate wavelength range. FGS is a "guider," which helps point the telescope. 

Instrument wavelength ranges

FGS

FGS/NIRISS is being built by the Canadian Space Agency.





Links & Resources:

Image Gallery View our FGS/NIRISS image gallery and our instrument-related video page.

Watch the Video Snap Shot of the FGS engineering test unit arriving at NASA Goddard: