The James Webb Space Telescope

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


News and Highlights

JWST mission update: on Thursday 16 July 2020, NASA announced it is now targeting Oct. 31, 2021, for the launch of the James Webb Space Telescope from French Guiana. The full press release can be found here.

For up-to-date information about the status of the JWST mission, please check the news section of the NASA JWST web site.

JWST cycle 1 proposal schedule update (copy of an announcement issued by STScI on the 23rd of July 2020, see here for the original announcement).

The major disruption caused by the COVID-19 pandemic continues to affect all of us. Integration and testing of the James Webb Space Telescope are among the activities impacted. NASA has re-evaluated the project schedule and announced a launch readiness date of October 31, 2021.

After consulting with the JWST Users Committee, STScI, NASA, ESA, and CSA have finalized the review schedule for Cycle 1 proposals.

The JWST Cycle 1 General Observer (GO) proposal deadline will be 08:00 p.m. Eastern Time (ET) on Tuesday November 24, 2020.

We are announcing the deadline well in advance, so that proposers have flexibility to prepare proposals as their COVID-impacted schedules permit. The Call for Proposals remains unchanged from its release earlier this year. All proposal tools and documentation are available to proposers.

The JWST Telescope Allocation Committee (TAC) will review the proposals in February 2021 and recommend the Cycle 1 GO science program for announcement in March 2021.

We send best wishes to our user community and their families in these challenging times. Any questions may be directed to the JWST Help Desk.

STScI Releases New Policy for Proposal Deadline Extensions Recognizing that the COVID-19 pandemic is an extremely challenging time, STScI has released a new policy for deadline extension appeals. The announcement made on the 9th of September 2020 can be found here.



Updated 11 September 2020

Most of the training workshops for the preparation to the JWST cycle-1 proposal call have now been completed either through face-to-face or on-line meetings. The few remaining workshops are currently on stand-by and will take place closer to the proposal deadline. Now that the new cycle 1 proposal deadline is known, an update on their schedule will be provided soon.

We wish to thank the local organisers for the efforts and the energy they put into the organisation of these workshops in a very difficult context.

The full list of Master Class workshops in Europe 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 October 2021


ESA JWST Master Class series - the training workshops for the preparation of the community to the JWST cycle-1 proposal call have now been completed either through face-to-face or on-line meetings.


More complete list of events maintained by STScI: here.




1 Mar 2021: James Webb Space Telescope completes final functional tests before preparing for launch

(Credit: NASA/Chris Gunn)

Highlights in images - Archive