langue fr ARIANESPACE - 25/12/2021

Arianespace Flight VA256 - Webb Space Telescope

On Saturday, December 25, 2021 at 9:20 am local time, an Ariane 5 rocket lifted off from the Guiana Space Center, Europes Spaceport in Kourou, French Guiana (South America), injecting the Webb Space Telescope, developed by NASA in partnership with ESA and the Canadian Space Agency (CSA), into its transfer orbit. The telescope was successfully separated from the launcher 27 minutes after liftoff.

The telescope now embarks on a voyage lasting 29 days to reach the second Lagrange point.

- On the third day, the heat shield will begin to deploy. On the eleventh day, the secondary mirror will begin positioning.
- Between the 13th and 14th day, the primary mirror, comprising 18 hexagonal segments and measuring 6.5 meters in diameter, will be assembled.
- The telescope is slated to arrive at its final destination, 1.5 million kilometers from Earth, approximately 29 days after launch.

The space agencies of the United States (NASA), Europe (ESA) and Canada (CSA) teamed up to develop this telescope. Europe played an important role in this mission, with ESA providing the launch onboard Ariane 5, as well as the Nirspec spectrometer built by Airbus. The astrophysics department of the Saclay-based CEA (French Alternative Energies and Atomic Energy Commission) and the Paris Observatory designed the MIRI camera. This is the most ambitious telescope ever sent into space.

Todays launch is the mission of the decade, said Stephane Israël, Chief Executive Officer of Arianespace, one that demonstrates the reliability of Arianespaces launch services in the eyes of the international space community. Its a great honor for us to have been chosen for this launch, which will enable humanity to take a giant step forward in its knowledge of the Universe. The mission demanded 20 years of preparation hand in hand with NASA. Its the third launch we have performed for the American space agency, clearly illustrating the advantage of large-scale international collaboration in space. I would like to thank ESA, NASA and CSA for entrusting us with their invaluable payload. To launch on Christmas morning 42 years after the takeoff of the first Ariane from this same Kourou site What a great end of year present for the space community gathered today for this launch.

I would also like to thank the teams of Arianespace, ArianeGroup, Cnes and ESA who worked without letup to ensure this success, all motivated by the same passion.

Intended as the successor to the Hubble Space Telescope, the Webb Space Telescope will be 100 times more powerful. It will incorporate improved and different technologies to capture 70% more light. Because of these innovations, astronomers will be able to make unprecedented observations that show the first stars and galaxies to be formed after the Big Bang.

This latest success is undoubtedly one of the most iconic space exploration launches performed by Ariane 5, following the Rosetta comet mission and Europes ATV resupply vessels for the International Space Station, said André-Hubert Roussel, CEO of ArianeGroup. Ariane 5 is known as the worlds most reliable launch vehicle, but, like everybody who contributed to the success of this mission, we were holding our breath when our launcher lifted off with this scientific jewel, one protected by a special fairing tailored for its sophisticated instruments. All previous launches also prepared this one, because we knew that the eyes of the world would be on us. There are just five more Ariane 5 launches scheduled before this legendary launcher bows out. Everybody at ArianeGroup is fully committed to making Ariane 6, scheduled for a first launch from Kourou in 2022, Europes next great achievement in space. I would like to thank ESA, NASA and CSA for placing their trust in us, and also all of our Ariane 5 partners in Europe, who are surely as proud as I am today.

The engineers from ArianeGroup, Arianespace and their European industrial partners developed specific solutions for this mission to ensure the perfect compatibility between Ariane 5 and its passenger.

Ariane 5 is a European Space Agency (ESA) program, carried out in collaboration between industry and public institutions. Marketed and operated by Arianespace, Ariane 5 launches are carried out at the Guiana Space Center (CSG) in Kourou, French Guiana, with support from the French space agency CNES (Centre national détudes spatiales).