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James Webb Space Telescope

    Ariane 5 Fueling is Complete

    In this illustration, the multilayered sunshield on NASA’s James Webb Space Telescope stretches out beneath the observatory’s honeycomb mirror

    Fueling for both the main and upper stages of the Ariane 5 rocket is now complete. In preparation for launch scheduled for no earlier than 7:20 am EST (9:20 am GFT). The cryogenic arms attached to the Ariane 5 are now supplying top-up fuel until liftoff. All systems are being continually measured to monitor the readiness …

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    We Are Go For Launch!

    Launch teams wearing Santa hats monitor the Webb telescope countdown from a control room.

    Webb has been confirmed as being go for launch, and the countdown clock was started! With weather reports looking favorable, the team authorized fueling of the Ariane 5, which began at 3 am EST. Arianespace will measure winds at high altitude with the help of balloons to ensure absolute safety for the launch. Meanwhile the …

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    Key Milestones After Liftoff

    In this illustration, the multilayered sunshield on NASA’s James Webb Space Telescope stretches out beneath the observatory’s honeycomb mirror

    Both immediately after launch and over the following weeks, the James Webb Space telescope will pass through numerous milestones on its journey of approximately 1 million miles to its final orbit around the second Lagrange point, commonly known as L2. NASA has a detailed plan to deploy the Webb Space Telescope over a roughly two-week …

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    Favorable Weather Expected for Dec. 25 Launch

    Arianespace's Ariane 5 rocket with NASA's James Webb Space Telescope onboard, is shown at the launch pad.

    The latest weather forecast has arrived and we are still go for launch tomorrow! The target launch date for the James Webb Space Telescope is Dec. 25. A 32-minute launch window opens at 7:20 a.m. EST in Kourou, French Guiana (9:20 a.m. GFT/12:20 UTC).

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    Join us to Watch the Webb Launch Live

    In this illustration, the multilayered sunshield on NASA’s James Webb Space Telescope stretches out beneath the observatory’s honeycomb mirror

    Webb has been installed onto the Ariane 5 rocket in preparation for launch at 7:20 a.m. Eastern time on Saturday, Dec. 25, 2021. We asked Amber Straughn, Webb deputy project scientist for communications, to tell us how people can watch the launch live online – and how to join the worldwide virtual Webb launch watch …

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    NASA, Partners Complete Webb Rocket Rollout

    Arianespace's Ariane 5 rocket with NASA's James Webb Space Telescope onboard, is seen sitting on the launch pad.

    NASA's James Webb Space Telescope – inside the Ariane 5 rocket it will ride to space – has arrived at its final location on Earth: the Arianespace ELA-3 launch complex at Europe's Spaceport located near Kourou, French Guiana. Webb is scheduled for liftoff at 7:20 am EST Saturday, Dec. 25. With Webb and its rocket securely on …

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    NASA, Partners Roll Out Webb to Launch Pad

    Arianespace's Ariane 5 rocket with NASA's James Webb Space Telescope onboard, is seen in the final assembly building ahead of the planned roll to the launch pad.

    NASA's James Webb Space Telescope has begun its stately rollout to the Arianespace ELA-3 launch complex at Europe's Spaceport located near Kourou, French Guiana. Arianespace and NASA will closely monitor the vitals of Webb and the Ariane 5 rocket during the nearly two-hour process. Webb is scheduled for liftoff at 7:20 am EST Saturday, Dec. …

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    NASA, Partners Confirm Webb Launch on Dec. 25

    white mockup of Ariane 5 rocket

    NASA, ESA (European Space Agency), and Arianespace confirmed a targeted launch date of Saturday, Dec. 25, for the James Webb Space Telescope. A 32-minute launch window opens at 7:20 a.m. EST in Kourou, French Guiana (9:20 a.m. GFT/12:20 UTC). An Ariane 5 rocket will lift off from Europe's Spaceport carrying NASA's next-generation space observatory. Related …

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    James Webb Space Telescope Launch Update

    In this illustration, the multilayered sunshield on NASA’s James Webb Space Telescope stretches out beneath the observatory’s honeycomb mirror

    Update: 4:30 p.m. EST, Dec. 21, 2021: NASA and Arianespace successfully completed the Launch Readiness Review for the James Webb Space Telescope on Dec. 21. The team authorized the Ariane 5 rocket carrying Webb to rollout and the start of launch sequencing for the mission. However, due to adverse weather conditions at Europe's Spaceport in …

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