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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.