May 4 1990
From The Space Library
Engineers at NASA ran tests of the Hubble Space Telescope to deter-mine if vibrations were interfering with precise pointing at specific stars. The problem had been discovered two days earlier when sensors locked on to a "guide star" to orient the spacecraft. Engineers noticed a slight wobble, one six-hundredth of a degree up and down every minute, that interfered with both fine pointing mechanisms and star observations. (NY Times, May 5/90)
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