About
STS-61 astronauts practice installing the corrective optics module on a Hubble Space Telescope mockup in Marshall Space Flight Center's Neutral Buoyancy Simulator. Test activities for STS-61 were carried out at Marshall from June 21, 1993 through July 2, 1993 and again in October 1993. — NASA MSFC · 1993. ABD devlet eseri: kamu mali, ticari islerde de serbestce kullanilabilir.
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