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This competition is now closed James Webb Space Telescope: Inside the high-stakes testing of Hubble’s £7.2bn successor After nearly 20 years of development and 16 launch delays, the James Webb Space Telescope (JWST) is almost ready. Set to launch on 31 October 2021, the largest space observatory ever built is set to revolutionise our understanding of the cosmos and help solve some of the Universe’s greatest mysteries. Advertisement It hasn’t been an easy journey. First conceived 30 years ago as the successor to the Hubble Space Telescope, the ‘Next Generation Telescope’ as the JWST was first known, has survived threats of cancellation, changes of leadership and numerous postponements. Expected to cost $10bn (£7.2bn approx), the JWST (named after NASA’s second administrator James E Webb) is the sixth most expensive space mission of all time.

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