James Webb Space Telescope: Watch its launch on video and ask your questions to researchers who will use it


The James Webb Space Telescope (JWST), built by the American (NASA), European (ESA) and Canadian (CSA) space agencies, is due to take off on Saturday, December 25 at 1:20 p.m. With its primary mirror with an area of ​​25 square meters, the largest ever sent into space, it must arrive 29 days later 1.5 million kilometers from Earth, around the point of Lagrange L2. Often touted as the successor to the Hubble Telescope, launched in 1990, due to the scale of the project, it will actually be quite different from its predecessor. Specifically developed to observe in the infrared, the James Webb should make it possible to observe the atmosphere of planets outside the solar system but also to study the universe as it was 13.7 billion years ago. , or 100 million years just after the Big Bang.

Who animates this direct?

Journalist Arthur Carpentier hosts this live video during which he will answer your questions. He is surrounded by three speakers to deepen different subjects around the James Webb Space Telescope. They have all participated in its development, or will take part in its operation.

The live video program

This live is divided into three main chapters with, as a climax, the takeoff of the JWST at the top of an Ariane 5 launcher, scheduled for 1:20 p.m., Paris time:

  • 11:00 – Beginning of the live
    11 h 15 In search of the first lights and galaxies of the Universe
    With Nicole Nesvadba, astrophysicist, CNRS research director at the Lagrange laboratory of the Côte d’Azur Observatory, specializing in the evolution of galaxies.
  • 12 h 15 – Presentation of the James Webb project: understanding the stakes of the astronomical event of the decade
    With Olivier La Marle, head of the Universe Sciences program at the National Center for Space Studies (CNES), the French space agency.
  • 13 h 20 – Lift-off !
  • 13 h 45 – Smell the air of exoplanets and look for traces of life: how the JWST must upset our knowledge of these distant worlds
    With Franck Selsis, CNRS research director at the Bordeaux astrophysics laboratory, specializing in the study of the atmospheres of exoplanets.

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