Webb Space Telescope’s Ariane 5 Rocket Core Stage Ready

Artist’s impression of the James Webb Space Telescope (Webb), folded in the Ariane 5 rocket during launch from Europe’s Spaceport in French Guiana. Credit: ESA – D. Ducros

Ariane 5 parts are coming together in the launch vehicle integration building for the launch of Webb from Europe’s Spaceport in French Guiana.

The Ariane 5 core stage is 5.4 m diameter and 30.5 m high. On November 6, 2021, it was taken out of its shipping container and raised vertical.

The Ariane 5 core stage is 5.4 m diameter and 30.5 m high. On November 6 it was taken out of its shipping container and raised vertical. Credit: ESA/CNES/Arianespace

At launch, it will contain 175 t of liquid oxygen and liquid hydrogen propellants. With its Vulcain 2 engine it provides 140 t of thrust. It also provides roll control during the main propulsion phase. This rolling maneuver will ensure that all parts of the payload are equally exposed to the sun which will avoid overheating of any elements of Webb.

Two boosters followed. They are 3 m in diameter and 31 m high. This week they will be positioned on the launch table and then anchored to the core stage. Engineers will then carry out mechanical and electrical checks. Each booster contains 240 t of solid propellant, together they will provide 1200 t of thrust which is 90 percent of the thrust at liftoff.

On the countdown to launch, the Vulcain 2 engine is ignited first. A few seconds later, when it reaches its nominal operating level, the two boosters are fired to achieve a thrust of about 1364 t at liftoff.

Webb will be the largest, most powerful telescope ever launched into space. As part of an international collaboration agreement, ESA is providing the telescope’s launch service using the Ariane 5 launch vehicle. Working with partners, ESA was responsible for the development and qualification of Ariane 5 adaptations for the Webb mission and for the procurement of the launch service by Arianespace.

Webb is an international partnership between NASA, ESA and the Canadian Space Agency (CSA).

ESA’s Ariane 5, manufactured by ArianeGroup, has been in operation since 1996 and has already completed more than 100 launches from Europe’s Spaceport in French Guiana. It is 53 m high and 5.4 m diameter with a mass at liftoff of 780 tonnes. Ariane 5 will deliver the James Webb Space Telescope directly into a highly precise L2 injection orbit. Webb will then continue its journey alone for four weeks, eventually arriving four times farther away than the Moon. Credit: ESA

These activities mark the beginning of a five-week campaign to prepare the Ariane 5 launch vehicle which runs in parallel with teams preparing Webb, which started three weeks earlier. Soon Webb will meet Ariane 5 and teams will unite for the final integration for launch.

European Space AgencyJames Webb Space TelescopeRocket
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  • Sîvvestar

    Vêjko bârti bûhvonaj za Vâšo tovmačeje vestî vsemîrskega raziskovâja v Svovênski jêzik. Zavôvo katîrih sê mi je utřnavo âno prašâje: A bô odgovôrnim za tâk dragocêni rašpitîn na raspovâgo tâk nazvâni înteřferometrîjski nadzôr, ko ga bôjo mâgvi postâjt na tôčno dovôčeno mêsto v vsemîrju îno, če je kãj tâkega pri tâknazvanem kavibřiraju tâkega inštrumênta h nûcu ?

  • Sîvvestar

    Jês pîšem v staro Korôškem diavêktu zavôvo têga, ko bôjo mâgvi nârtomaj ãno tretjîno vsêh frekvênc zapvombîrat. Zadêvi têga, kô se kompvementãrno popôvnoma zasêdeni râdijski kanâvi odbîjajo od Sûnčne kôrone na vsê strâni svemîrja in raznâšajo dûh po svînski pečênki po cîvem univêrzumu. Pîsaje v diavêktih in rãznih svêngih – kvinopîsju in hierogvîfih pâ utêgne dêvno nadomêstit zapvômbirane frekvênce in bôjo gûrši od nezaževêne pôšte ino sovřažnih namînov, ki jêh je pôvno z strâni nepodôčenih in predvsêm strokôvnih inštanc. Zatêga dêvi bi bâvo gûrši, če dôkvadòv v posîbnih šprâhah spvôh ne objâvjate namêsto, da jih pîsMENO RAZhajkate.