![](https://webarchive.library.unt.edu/eot2008/20090825021927im_/http://hubble.nasa.gov/art/zzicons/shim.gif) |
(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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![](https://webarchive.library.unt.edu/eot2008/20090825021927im_/http://hubble.nasa.gov/art/zzicons/shim.gif) |
![](https://webarchive.library.unt.edu/eot2008/20090825021927im_/http://hubble.nasa.gov/art/zzicons/shim.gif) |
+ Images of Mission
![STS-31 Crew (left to right): Charles F. Bolden,Steven A. Hawley, Loren J. Shriver, Bruce McCandless, Kathryn D. Sullivan STS-31 Crew (left to right): Charles F. Bolden,Steven A. Hawley, Loren J. Shriver, Bruce McCandless, Kathryn D. Sullivan](https://webarchive.library.unt.edu/eot2008/20090825021927im_/http://hubble.nasa.gov/art/shuttle_missions/sts31crew-150.jpg)
STS-31 Crew
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