The James Webb Space Telescope

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


News and Highlights

29 September 2017 - The James Webb Space Telescope to be Launched in Spring 2019.

The James Webb Space Telescope is now planning to launch between March and June 2019 from French Guiana, following a schedule assessment of the remaining integration and test activities.

The press release from NASA announcing the new launch period can be found here.


The Call for Proposals for the Early Release Science program is now closed. The results of the selection will be announced in Nov 2017.

The next call will be for General Observers (GOs) and it will be issued on the 30th of November 2017. The deadline for GO proposal submission remains unchanged as the 2nd of March 2018. The Telescope Allocation Committee will meet to review the proposals at Space Telescope Science Institute during the last two weeks of June. The results will be announced in July 2018.

All the details can be found on STScI's web site

News and Highlights - Archive

The mission

JWST newsletter

JWST's instruments

JWST is a joint NASA/ESA/CSA mission


Mission Status:

Launch in Spring 2019


04-06 October 2017 in ESAC, Spain

ESAC 2017 JWST workshop - Planning your JWST observations - [GET SET]

13-15 December 2017 in ESTEC, Netherlands

Planning Solar System observations with JWST - European venue

(note that a twin workshop is held at STScI in November 2017 - see here)

3-6 April 2018 in Liverpool, UK

"Early Science with JWST" symposium at EWASS 2018.

20-22 August 2018 in Vienna, Austria

Focus meeting "JWST: launch, commissioning and cycle 1 science" during the 2018 IAU General Assembly.

More complete list of events maintained by STScI: here.

Image of the month:


JWST is being prepared to enter the enormous cryogenic chamber at NASA’s Johnson Space Center in Houston, where it will undergo comprehensive testing at temperatures similar to those of the environment at L2. 

(Credit: NASA)

Image of the Month - Archive