James Webb Space Telescope

A powerful infrared observatory studying the earliest galaxies and exoplanet atmospheres.

About the mission

The James Webb Space Telescope is the largest and most powerful space telescope ever built. Its infrared instruments allow astronomers to peer through cosmic dust, look back at the formation of the earliest galaxies, and analyze the atmospheres of distant exoplanets.

Primary sources

• https://science.nasa.gov/mission/webb/
• https://www.jwst.nasa.gov/

Last verified 2026-01-15. Mission status and dates can change.