Ariane 5 ECA+ | James Webb Space Telescope (JWST)
Ariane Launch Area 3
Guiana Space Centre, French Guiana
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James Webb Space Telescope (JWST)
The James Webb Space Telescope is a space telescope developed by NASA, ESA and CSA to succeed the Hubble Space Telescope as NASA's flagship astrophysics mission. Its primary mirror, the Optical Telescope Element, is composed of 18 hexagonal mirror segments which combine to create a 6.5 m diameter mirror, considerably larger than Hubble's 2.4 m mirror. This will allow JWST to provide improved infrared resolution and sensitivity over Hubble, and will enable a broad range of investigations across the fields of astronomy and cosmology, including observing some of the most distant events and objects in the universe, such as the formation of the first galaxies.
Ariane 5 ECA+
Height 57.70 Meters
Max Stages 2
Mass To GTO 10200 kg
Liftoff Thrust 11400 kN
Diameter 5.40 Meters
Mass To LEO 0 kg
Liftoff Mass 780 Tonnes
Launch Success 11
Consecutive Success 11
Maiden Flight 2019-08-07
Launch Failures 0
Updates
SwGustav
2021-12-25T12:58:31+0000
Successful launch confirmed
SwGustav
2021-12-21T21:37:17+0000
Delaying by 24 hours due to adverse weather forecast
Jay
2021-12-17T22:18:45+0000
Go for launch.
Cosmic_Penguin
2021-12-15T00:25:39+0000
New NET date.
Cosmic_Penguin
2021-11-25T00:56:35+0000
New launch date confirmed after additional spacecraft testing.
Nosu
2021-11-22T21:37:57+0000
Delayed by four days due to a processing incident.
Nosu
2021-10-13T20:09:44+0000
Adding launch window
spacevogel
2021-09-08T13:22:56+0000
Targeted launch date announced
Nosu
2021-06-02T12:20:55+0000
JWST launch now TBD November.
Programs
NASA Large Strategic Science Missions
NASA's large strategic science missions or large strategic missions, formerly known as Flagship missions or Flagship-class missions, are the costliest and most capable NASA science spacecraft. Flagship missions exist within all four divisions of NASA's Science Mission Directorate (SMD): the astrophysics, Earth science, heliophysics and planetary science divisions.
Related Events
SXSW 2023 Conference JWST Keynote
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Experts from NASA and ESA will share a never before seen image from the James Webb Space Telescope, talk about Webb’s latest scientific discoveries, and how this observatory will continue to explore the uncharted territories of our cosmos.
JWST Early Results Media Teleconference
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Experts from NASA and other institutions will answer media questions about early science results from the agency’s James Webb Space Telescope.
JWST Post-First Images Media Briefing
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NASA will host a media briefing on the Webb’s first images.
JWST Image Release
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NASA will reveal first full-color images and data from the James Webb Space Telescope.
JWST First Image Preview
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NASA Administrator Bill Nelson and U.S. President Joe Biden will unveil the first science image taken by the James Webb Space Telescope.
JWST Pre-First Images Media Briefing
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NASA will host a media day at the Space Telescope Science Institute (STScI) on Wednesday, June 29. The event will begin with a media briefing on the status of Webb’s commissioning as well as overviews of planned science for Webb’s first year of operations and Webb image processing.
JWST Alignment & Instrument Setup Media Teleconference
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NASA will hold a media teleconference to discuss progress toward preparing the James Webb Space Telescope for science operations.
JWST Mirror Alignment Virtual Media Briefing
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NASA will hold a virtual media briefing at noon EDT Wednesday, March 16, to provide an update on the James Webb Space Telescope’s mirror alignment. The briefing will air live on NASA TV, the NASA app, and the agency’s website. Participants will share progress made in aligning Webb’s mirrors, resulting in a fully focused image of a single star. NASA will make imagery demonstrating the completion of this milestone available on the agency’s website at 11:30 a.m., prior to the briefing.
JWST Science Live
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NASA will hold a Science Live episode providing updates on primary mirror movements and L2 insertion burn.
JWST Post-Deployment News Conference
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NASA will hold a news conference about the conclusion of the James Webb Space Telescope’s major spacecraft deployments.
JWST Final Primary Mirror Wing Deployment
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NASA will deploy James Webb Space Telescope's final primary mirror wing, completing all major deployments.
James Webb Space Telescope secondary mirror deployment
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NASA will host a livestream during the deployment of James Webb Space Telescope's secondary mirror.
James Webb Space Telescope sunshield tensioning
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NASA will begin tensioning James Webb Space Telescope's sunshield.
JWST Post-Launch Briefing
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NASA will host a media briefing after the launch of the James Webb Space Telescope (JWST).
JWST Pre-Launch News Conference
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NASA will host a media briefing about the upcoming launch of the James Webb Space Telescope (JWST).
James Webb Telescope Week One Deployments Update
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NASA will hold a media teleconference providing updates on the deployment of the James Webb Space Telescope.
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JWST arrives at final orbit
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Arstechnica
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NASA completes major JWST deployments
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Arstechnica
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Arstechnica
The James Webb Telescope is now super cool (thanks to its new sunshield)
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NASA
Sunshield Successfully Deploys on NASA’s Next Flagship Telescope
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SpaceNews
JWST begins sunshield tensioning
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Spaceflight Now
NASA resumes Webb deployments after pausing for weekend
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Arstechnica
NASA might just pull off the James Webb Space Telescope deployment
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SpaceNews
NASA takes break in JWST deployment after extending sunshield
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Spaceflight Now
Webb telescope unfurls diamond-shaped sunshield
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NASA
Update: NASA Plans Coverage of Webb Space Telescope Deployments
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NASA
NASA Plans Coverage of Webb Space Telescope Deployments
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Spaceflight Now
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SpaceNews
JWST begins sunshield deployment
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Spaceflight Now
Telescope tower extends on Webb observatory
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Spaceflight Now
High-stakes sunshield deployment begins on Webb telescope
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James Webb Space Telescope en route to L2; deployment sequence underway
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Spaceflight Now
Webb telescope completes first course correction burn, deploys main antenna
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Spaceflight Now
Webb telescope finally leaves Earth in search of light from first galaxies
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SpaceNews
Ariane 5 launches NASA’s James Webb Space Telescope
2021-12-25T13:16:00+0000
NASA
NASA's Webb Telescope Launches to See First Galaxies, Distant Worlds
2021-12-24T23:06:38+0000
Spaceflight Now
Europe’s spaceport, flagship launcher ready for historic Webb mission
2021-12-24T21:06:29+0000
NASASpaceflight
NASA, ESA, CSA successfully launch the historic James Webb Space Telescope
2021-12-24T15:06:38+0000
Spaceflight Now
Video: Keith Parrish, Webb’s commissioning manager, talks through telescope deployments
2021-12-24T02:46:38+0000
Spaceflight Now
Webb’s fate hinges on high-risk sunshade, mirror deployments
2021-12-23T09:46:46+0000
SpaceNews
JWST launch marks only the start of a risky deployment process
2021-12-23T09:46:38+0000
Spaceflight Now
Webb will take next leap in search for habitable worlds
2021-12-23T01:06:38+0000
Spaceflight Now
Webb telescope is a ‘time machine’ for astronomers to see the cosmic dawn
2021-12-21T23:46:43+0000
SpaceNews
Weather bumps JWST launch to Christmas Day
2021-12-21T00:16:39+0000
Spaceflight Now
Launch of Webb telescope delayed to Christmas morning
2021-12-18T15:36:00+0000
NASA
NASA Sets Coverage, Invites Public to View Webb Telescope Launch
2021-12-18T06:16:39+0000
Spaceflight Now
Webb telescope encapsulated inside Ariane 5 rocket’s nose cone
2021-12-17T23:26:45+0000
SpaceNews
JWST launch rescheduled for Dec. 24
2021-12-16T15:06:38+0000
Spaceflight Now
Webb telescope testing on tap before setting target launch date
2021-12-15T12:20:11+0000
SpaceNews
Communications problem delays JWST launch
2021-12-14T01:40:17+0000
Spaceflight Now
NASA delays launch of Webb telescope to no earlier than Dec. 24
2021-12-14T00:20:18+0000
Spaceflight Now
Webb telescope mounted on top of Ariane 5 rocket in French Guiana
2021-12-10T05:40:07+0000
Spaceflight Now
Webb telescope fueled for flight, ready for lifting atop launcher
2021-11-30T17:11:49+0000
NASASpaceflight
Seeing the universe in the Mid-Infrared with James Webb’s MIRI instrument
2021-11-29T14:45:40+0000
Arstechnica
James Webb Space Telescope cleared for late December launch
2021-11-28T05:31:59+0000
Spaceflight Now
NASA gives green light to fuel James Webb Space Telescope
2021-11-25T16:12:05+0000
SpaceNews
JWST undamaged from payload processing incident
2021-11-22T22:09:39+0000
Arstechnica
An “incident” with the James Webb Space Telescope has occurred
2021-11-22T19:35:00+0000
NASA
NASA Provides Update on Webb Telescope Launch
2021-11-21T21:03:31+0000
NASASpaceflight
Unfolding the universe: the commissioning process of the James Webb Space Telescope
2021-11-16T22:07:00+0000
NASA
NASA Invites Media to Webb Telescope Science Briefings
2021-11-13T21:47:49+0000
NASASpaceflight
The mirror of the James Webb Space Telescope: looking into the past
2021-11-07T20:16:49+0000
Spaceflight Now
Ariane 5 fairing cleared for Webb launch after “perfect” performance on last flight
2021-11-05T05:26:54+0000
Spaceflight Now
NASA shows off finished SLS moon rocket, Webb telescope
2021-11-02T18:20:47+0000
NASASpaceflight
Teams evaluate Hubble safe mode event, history of telescope leads to JWST
2021-10-28T13:53:00+0000
NASA
NASA to Host Briefing on Webb Telescope Engineering, Deployments
2021-10-28T09:53:13+0000
SpaceNews
JWST launch preparations on track
2021-10-23T21:10:54+0000
NASASpaceflight
Ariane 5 launches civilian, military satellites; mission to clear way for James Webb launch
2021-10-23T19:13:07+0000
Spaceflight Now
Under watchful eye of NASA, teams prep for final Ariane 5 flight before Webb
2021-10-20T22:23:14+0000
SpaceNews
NASA defends decision to retain JWST name
2021-10-20T18:03:00+0000
NASA
NASA Shares Webb Telescope Media Briefing Schedule, Resources
2021-10-19T22:43:06+0000
Spaceflight Now
Webb telescope unboxed after shipment to Guiana Space Center
2021-10-12T16:39:24+0000
ESA
ESA welcomes Webb in French Guiana for launch on Ariane 5
2021-10-12T15:09:00+0000
NASA
NASA’s Webb Space Telescope Arrives in French Guiana After Sea Voyage
2021-10-12T04:09:07+0000
Spaceflight Now
Webb completes sea voyage to launch base in French Guiana
2021-10-08T19:19:00+0000
NASA
NASA Invites Media to James Webb Space Telescope Launch
2021-10-06T14:29:00+0000
NASA
NASA Invites Media to Webb Telescope Launch Coverage Discussion
2021-09-30T19:51:25+0000
Spaceflight Now
After two decades, the Webb telescope is finished and on the way to its launch site
2021-09-22T14:41:00+0000
NASA
NASA Invites Media to Webb Telescope Prelaunch Events in French Guiana
2021-09-09T07:56:17+0000
SpaceNews
JWST gets mid-December launch date
2021-09-08T13:54:43+0000
Arstechnica
The James Webb telescope has a bona fide launch date
2021-09-08T13:16:00+0000
NASA
NASA Readies James Webb Space Telescope for December Launch
2021-08-27T11:00:49+0000
Arstechnica
Rocket Report: Webb telescope ready for launch, LOX shortage slows SpaceX
2021-07-07T18:44:53+0000
NASASpaceflight
James Webb passes critical mission review for 2021 launch, final testing nearing completion
2021-07-06T11:32:00+0000
SpaceNews
JWST passes launch review
2021-06-02T11:33:21+0000
SpaceNews
JWST launch slips to November
2021-06-01T15:45:16+0000
Arstechnica
Webb telescope launch date slips again
2021-05-14T11:00:08+0000
Arstechnica
Rocket Report: Starship orbital flight details, Ariane 5 may delay Webb launch
2021-05-12T00:18:21+0000
SpaceNews
Ariane 5 issue could delay JWST
2021-05-05T21:36:00+0000
NASA
Media Invited to Virtual Briefing as NASA’s Webb Prepares for Launch
2021-03-30T15:34:15+0000
ESA
Selection of the first James Webb Space Telescope General Observer Scientific Programmes
2021-03-18T11:44:29+0000
SpaceNews
JWST moving towards October launch
2021-01-11T17:10:28+0000
Spaceflight Now
James Webb, OneWeb highlight Arianespace’s 2021 launch schedule
2020-11-17T19:36:12+0000
NASASpaceflight
James Webb on track for October 2021 launch; final testing underway
2020-10-20T11:09:30+0000
SpaceNews
JWST remains on track for October 2021 launch
2020-10-07T01:36:00+0000
Spaceflight Now
JWST completes tests to simulate rigors of launch
2020-08-25T21:15:57+0000
NASASpaceflight
James Webb passes critical test as telescope moves toward 2021 launch
2020-07-16T23:03:54+0000
SpaceNews
NASA delays JWST launch by seven months
2020-07-16T21:36:29+0000
Arstechnica
NASA now targeting Halloween, 2021, for launch of James Webb telescope
2020-07-16T17:41:00+0000
Spaceflight Now
NASA announces seven-month launch delay for JWST
2020-07-16T17:17:00+0000
NASA
NASA Announces New James Webb Space Telescope Target Launch Date
2020-07-16T05:20:51+0000
ESA
James Webb Space Telescope to launch in October 2021
2020-07-15T16:00:00+0000
NASA
NASA to Provide Update on James Webb Space Telescope
2020-06-25T10:38:41+0000
SpaceNews
NASA expects to cover JWST launch slip with budget reserves
2020-06-15T22:31:00+0000
Spaceflight Now
NASA says JWST won’t be ready for launch in March 2021
2020-06-10T19:58:28+0000
SpaceNews
NASA confirms JWST will miss March 2021 launch date
2020-06-10T17:19:11+0000
Arstechnica
James Webb Space Telescope will “absolutely” not launch in March
2020-06-03T11:23:50+0000
SpaceNews
Work on JWST ramps up again
2020-04-14T19:37:56+0000
NASASpaceflight
NASA’s James Webb Space Telescope Completes Primary Mirror Test
2020-03-23T08:46:00+0000
Spaceflight Now
NASA confirms work stoppage on James Webb Space Telescope
2020-01-30T04:08:00+0000
Spaceflight Now
Government watchdog warns of another JWST launch delay
2020-01-29T15:51:17+0000
Arstechnica
Report: Webb telescope has just a 12 percent chance of making launch date
2020-01-28T23:25:02+0000
SpaceNews
GAO warns of more JWST delays
2020-01-07T12:53:11+0000
SpaceNews
JWST remains on schedule for March 2021 launch
2019-08-29T19:00:22+0000
Spaceflight Now
James Webb Space Telescope fully assembled in California
2019-03-26T23:00:00+0000
SpaceNews
JWST review board raises schedule concerns
2019-02-10T23:00:00+0000
SpaceNews
NASA minimizes threat of JWST delay from shutdown
2019-01-17T23:00:00+0000
SpaceNews
House spending bill fires warning shot at JWST
2018-11-19T23:00:00+0000
SpaceNews
Senator seeks assurances on JWST and WFIRST funding
2018-10-31T23:00:00+0000
SpaceNews
