Figure It Out: How They Kept the Hubble Space Telescope Working

The Hubble Space Telescope got off to a rocky start after its April, 1990 deployment, when operators found that its high-gain antenna was mysteriously stuck. Then in 1994, it went on the fritz with Comet Shoemaker-Levy 9 on a beeline for Jupiter. Engineers have had to dig deep into their tool kits to confront a series of potentially fatal technical obstacles.