Where was the James Webb Space Telescope built?

The James Webb Space Telescope (JWST) is a marvel of engineering that has taken years to build. This groundbreaking space observatory was constructed at multiple locations across the United States and Europe. Here’s everything you need to know about where the JWST was built.

Primary Contractor

The primary contractor responsible for building the JWST was Northrop Grumman. The company’s Space Park facility in Redondo Beach, California, served as the main assembly location for the telescope.


The James Webb Space Telescope (JWST) is a complex space observatory that consists of several major components. Let’s take a closer look at the main components of the JWST and where they were built:


One of the most critical components of the JWST is the sunshield, which protects the telescope’s sensitive instruments from the Sun’s intense heat. The sunshield comprises five layers of a special material that can withstand extreme temperatures. Northrop Grumman built the sunshield at its facility in Redondo Beach, California.

Optical Telescope Element

The Optical Telescope Element (OTE) is the heart of the JWST, as it is responsible for collecting light from distant objects in space. It comprises a primary mirror, a secondary mirror, and supporting structures. Ball Aerospace built the OTE in Boulder, Colorado.

Integrated Science Instrument Module

The Integrated Science Instrument Module (ISIM) contains the four main scientific instruments of the JWST, namely the Near Infrared Camera (NIRCam), the Near Infrared Spectrograph (NIRSpec), the Mid-Infrared Instrument (MIRI), and the Fine Guidance Sensor/Near InfraRed Imager and Slitless Spectrograph (FGS/NIRISS). The ISIM was built by a team of institutions led by the Goddard Space Flight Center in Greenbelt, Maryland.

Spacecraft Bus

The spacecraft bus is the backbone of the JWST, providing power, propulsion, and communications. Airbus Defense and Space built the spacecraft bus in Germany.

Launch Vehicle

The JWST launched on an Ariane 5 rocket, which the European space company Arianespace built.

Collaboration Across Continents

The James Webb Space Telescope is the result of a collaboration between NASA, the European Space Agency (ESA), and the Canadian Space Agency (CSA). The telescope’s scientific instruments were built by a consortium of institutions from across Europe and the United States.

Final Thoughts

The construction of the James Webb Space Telescope involved a massive international effort, with contributions from numerous organizations across multiple continents. The end result is a powerful space observatory that is expected to revolutionize our understanding of the universe.