By Jon Powell

Published: Wednesday, 24 November 2021 at 12:00 am


Science fiction may have informed us in 1979 via Alien that “In space no one can hear you scream”, but the verbal anguish from control centres here on Earth when space missions go wrong has at times been all too loud and clear.

Take the Hubble Space Telescope. It was soon apparent after the $1.5 billion instrument was deployed in April 1990 that something was awry: the long-awaited crystal-clear views of the heavens looked worryingly blurry.

Instead of a sequence of glorious pictures, Hubble squinted hopelessly into the distance. But a 1993 spacewalk corrected the flaw in Hubble’s mirror, just 1/50th the thickness of a human hair, and the telescope has exceeded expectations ever since.