The James Webb Space Telescope

Welcome to ESA's website for JWST's scientific community



04 June 2019 - The ESA JWST master class call is now closed. The results will be announced toward the end of July.

News and Highlights

04 June 2019 - The James Webb Space Telescope (JWST) emerged successfully from final thermal vacuum test. The JWST has successfully cleared another critical testing milestone, taking it one step closer to its 2021 launch. The spacecraft has gone through its final thermal vacuum test meant to ensure that its hardware will function electronically in the vacuum of space, and withstand the extreme temperature variations it will encounter on its mission. The full text of NASA's press release from the 30th of May can be found here.


26 April 2019 - JWST Cycle 1 Proposal Schedule. STScI published the finalized JWST cycle-1 proposal schedule. The full text of the announcement can be found here.

News and Highlights - Archive

The mission

JWST newsletter

JWST's instruments

JWST is a joint NASA/ESA/CSA mission


Mission Status:

Launch in March 2021


24-28 June 2019 - EWASS 2019 in Lyon. The JWST mission will be present on the ESA booth.


More complete list of events maintained by STScI: here.

Image of the month:

Calibration exposure acquired with NIRSpec in Multi-Object Spectroscopy (MOS) mode during OTIS testing in 2017. The image was produced by sending commands to open over 100 of the instrument's microshutters. 

(Credit: ESA/SOT)

Image of the Month - Archive