Watch the Launch

Additional Media

James Webb Space Telescope Launch — Official NASA Broadcast

Watch the launch of the James Webb Space Telescope—the most powerful space telescope ever made. This mission launched at 7:20 a.m. EST (12:20 UTC), Dec. 25, 2021, aboard an Ariane 5 rocket from Europe...

Flight VA256 – James Webb Space Telescope | Ariane 5 Launch | Arianespace

Summary: 00:00:00 Start of the livestream 00:03:21 Launch status update 00:05:23 Good Luck Webb 00:06:04 Launcher’s roll-out 00:07:02 JWST basic facts 00:11:12 JWST science goals 00:17:44 JWST challen...

James Webb Space Telescope

NASA's James Webb Space Telescope (JWST), developed in partnership with ESA and CSA, is operated by AURA's Space Telescope Science Institute.

James Webb Space Telescope (JWST)

Circle Image

Overview

Destination: Sun-Earth L2
Mission: Astrophysics

Sun-Earth L2 Ariane Launch Area 3 Guiana Space Centre, French Guiana

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.

Updates

SwGustav • Dec. 25, 2021, 12:58 p.m.

Successful launch confirmed


SwGustav • Dec. 21, 2021, 9:37 p.m.

Delaying by 24 hours due to adverse weather forecast


Jay • Dec. 17, 2021, 10:18 p.m.

Go for launch.


Cosmic_Penguin • Dec. 15, 2021, 12:25 a.m.

New NET date.


Cosmic_Penguin • Nov. 25, 2021, 12:56 a.m.

New launch date confirmed after additional spacecraft testing.


Ariane 5 ECA+

Family:
Configuration: ECA+

Ariane 5 ECA+ is a variant of the Ariane 5 heavy-lift vehicle, with a taller ECA-D upper stage.

Specifications
  • Max Stage
    2
  • Length
    57.7 m
  • Diameter
    5.4 m
  • Fairing Diameter
    5.4 m
  • Launch Mass
    780.0 T
  • Thrust
    11400.0 kN
Family
  • Name
    Ariane 5 ECA+
  • Family
  • Variant
    ECA+
  • Alias
  • Full Name
    Ariane 5 ECA+
Payload Capacity
  • Launch Cost
  • Low Earth Orbit
  • Geostationary Transfer Orbit
    10200.0 kg
  • Direct Geostationary
  • Sun-Synchronous Capacity

ArianeGroup

ArianeGroup

(AG)

CEO: Martin Sion Founded: 2015 Successes: 0 Failures: 0 Pending: 0

Agency Type:

ArianeGroup (formerly Airbus Safran Launchers) is an aerospace company based in France. A joint venture between Airbus and Safran, the company was founded in 2015 and is headquartered in Issy-les-Moulineaux. It consists of three core arms: aerospace, defence and security.

INFO WIKI

Related News

NASA

Artifacts From NASA’s Webb, Parker Solar Probe on View at Smithsonian

A testing replica of the “backbone” of NASA’s James Webb Space Telescope and a full-scale model of the agency’s Parker Solar Probe are now on permanent display at the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center…

NASA

Webb Spots Details in Nearby Spiral Galaxy

Stars peek through the dusty, winding arms of NGC 5134, a spiral galaxy located 65 million light-years away, in this Feb. 20, 2026, image from NASA’s James Webb Space Telescope. Webb’s Mid-Infrared Instrument collects the mid-infrared ligh…

NASA

Webb Studies Cranium Nebula

Nebula PMR 1 is a cloud of gas and dust that bears an uncanny resemblance to a brain in a transparent skull, inspiring its nickname, the “Exposed Cranium” nebula. Webb captured its unusual features in both near- and mid-infrared light. The…

NASA

NASA’s Webb Examines Cranium Nebula

Two heads are better than one in the latest images from NASA’s James Webb Space Telescope, which reveal new detail in a mysterious, little-studied nebula surrounding a dying star.  Nebula PMR 1 is a cloud of gas and dust that bears an unca…

NASA

NASA’s Webb Delivers Unprecedented Look Into Heart of Circinus Galaxy

The Circinus Galaxy, a galaxy about 13 million light-years away, contains an active supermassive black hole that continues to influence its evolution. The largest source of infrared light from the region closest to the black hole itself wa…

Guiana Space Centre, French Guiana

Ariane Launch Area 3


Kuaizhou 11
Success
21 hours, 36 minutes ago
8 satellites
Launch Area 95A - Jiuquan Satellite Launch Center, People's Republic of China

Ride-share launch of 8 satellites to sun-synchronous orbit. Details TBD.


Long March 6A
Success
1 day, 12 hours ago
Yaogan 50-02
Launch Complex 9A - Taiyuan Satellite Launch Center, People's Republic of China

The Yaogan 50-02 is a Chinese military “remote sensing” satellite of unknown purposes.


Falcon 9
Success
2 days, 13 hours ago
Starlink Group 10-48
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

A batch of 29 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Falcon 9
Success
3 days, 10 hours ago
Starlink Group 17-31
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 25 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Long March 2D
Success
4 days, 3 hours ago
Shiyan 30 03-04
Launch Complex 3 (LC-3/LA-1) - Xichang Satellite Launch Center, People's Republic of China

A pair of Chinese satellites reported to be for "Earth observation technological testing and validation" purposes. Actual usage not known.


Long March 8A
Success
4 days, 6 hours ago
SatNet LEO Group 20
Commercial LC-1 - Wenchang Space Launch Site, People's Republic of China

A batch of 9 Low Earth Orbit communication satellites for the Chinese state owned SatNet constellation operated by the China Satellite Network Group.…


Firefly Alpha
Success
5 days ago
Stairway to Seven
Space Launch Complex 2W - Vandenberg SFB, CA, USA

Firefly Alpha's Flight 7 is a test flight and return-To-Flight for the launch vehicle after its April 2025 launch failure. It will test and validate …


Falcon 9
Success
6 days, 21 hours ago
EchoStar 25
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

EchoStar 25 is a direct broadcast satellite, built on the proven Maxar 1300 series platform, which will deliver content across North America. It will…


Falcon 9
Success
1 week, 1 day ago
Starlink Group 17-18
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 25 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Electron
Success
1 week, 4 days ago
Insight At Speed Is A Friend Indeed (BlackSky Gen-3 4)
Rocket Lab Launch Complex 1A - Rocket Lab Launch Complex 1, Mahia Peninsula, New Zealand

Note: Payload and customer identities were not publicly announced. 4th of the BlackSky Gen-3 high resolution Earth-imaging satellites.