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John Mather captured on Twitter during our second Tweet Chat. John Mather captured on Twitter during our first Tweet Chat. John Mather (Nobel Laureate and Webb Senior Project Scientist) answering questions on Reddit. Paul Geithner discusses progress, plans and next steps in building the Webb Telescope.

Paul Geithner: James Webb Space Telescope Coming Together (new window).

Paul Geithner provides insight on why the Webb telescope focuses on the infrared.

Paul Geithner: It's All About Infrared - Why Build Webb (new window).

Recently Paul Geithner provided a closer look at the technologies on the observatory. The Webb telescope is a showcase for new technologies.

Paul Geithner: Components & Structure of Webb (new window).

Paul Geithner (Webb Deputy Project Manager, Technical) provides answers to questions about the kind of freezing temperatures the Webb telescope will endure in space.

Paul Geithner: Freezing NASA's Webb Telescope Is a Matter of Survival (new window).

Lee Feinberg talks about the top 3 things that Webb can do that Hubble cannot and more.

Lee Feinberg AMA: Optical Telescope Element Manager for Webb (new window).

Q & A with engineers cryo-testing the telescope.

Technical FAQ specifically on Solar System observations. Technical FAQ on a variety of mission issues, aspects and capabilities. (General Public)Īll the major aspects of the Webb Mission are covered here. Its 18 hexagonal segments are made of lightweight beryllium coated with pure gold.The most popular questions about Webb.

7–8 January 2022: Deployment of the two side panels forming JWST’s 6.5m primary mirror.

6 January 2022: Deployment of the 1.2m x 2.4m Aft Deployable Instrument Radiator (ADIR), which radiates heat from the space telescope’s science instruments into space.

The foldable structure supporting it has been dubbed “the world’s most sophisticated tripod”.

5 January 2022: JWST’s 74cm convex secondary mirror is deployed.While the Sun-facing side endures temperatures up to 90☌, the shielded side will be as cold as –230☌. 3–4 January 2022: The five Kapton layers of Webb’s sunshield are tensioned.30–31 December 2021: Sunshield mid-booms are extended on either side, pulling the folded sunshield layers with them, to form the first part of its distinctive 21m x 14m kite shape.29 December 2021: The Deployable Tower Assembly (DTA) is raised by 1.2m for better thermal isolation and to give room for the sunshield to unfold in front and behind.28 December 2021: The Forward Unitized Pallet Structure (UPS), which supports and contains the five folded layers forming the front half of the sunshield, is lowered into place.26 December 2021: Deployment of the high-gain communications antenna, which allows communication with Earth through NASA’s Deep Space Network.

The telescope can now switch from battery power to its own power. 25 December 2021, 12:48 UT Deployment of JWST’s 6m, five-panel solar array, which delivers about 1Kw of power.25 December 2021, 12:20 UT: JWST launches from the Guiana Space Centre on an Ariane 5 rocket after 27 minutes, it separates from the launcher’s upper stage to travel to L2 alone.Here's a timeline of how it all took place.