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(Shuttle Mission: STS-31)
Shuttle: Discovery
Date: April 24-29, 1990
- April 25, 1990: Hubble Space Telescope deployed into orbit.
- June 25, 1990: Spherical aberration discovered in Hubble's
primary mirror
- Later in the year COSTAR (Corrective Optics Space Telescope Axial Replacement)
was approved. COSTAR was a complex packaging of five optical mirror
pairs which would rectify the spherical aberration in Hubble's primary
mirror.
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