How Astronauts Fixed Hubble's Blurry Mirror With Glasses

A space telescope launched in 1990 took blurry pictures because its main mirror had the wrong shape, and the fix was not a new mirror but corrective optics fitted by shuttle astronauts. This is the story of the Hubble mirror flaw, the COSTAR package (the "glasses") and the five spacewalks of NASA's first servicing mission in December 1993. Facts in this video were checked against NASA pages: the Hubble optics page, "Hubble's Mirror Flaw", the NASA history article "30 Years Ago: STS-61, the First Hubble Servicing Mission", and NASA's 25th-anniversary article on the first repair mission, plus the ESA/Hubble history page. NASA's own pages give different figures for the size of the mirror error, so the video does not state one number, only that it was smaller than the width of a human hair. CREDITS Video, all NASA material (credit shown on screen for each clip, picture only, original sound removed): NASA TV recordings of the STS-61 mission, December 1993 (launch, capture, spacewalks, release), NASA / Internet Archive: https://archive.org/details/nasa-spac... (tapes 01, 02, 08, 09, 10) "Hubble Servicing Missions Quick Overviews", Servicing Mission 1 reel, NASA's Goddard Space Flight Center / Scientific Visualization Studio: https://svs.gsfc.nasa.gov/14114 (music removed) NASA TV Hubble Space Telescope 25th Anniversary Resource Reel (1990 clean-room film): https://archive.org/details/nasa_tv-H... NASA "Shuttle Showcase: STS-31", Hubble deployment: https://archive.org/details/ShuttleSh... Photos: NASA (STS-61 flight photographs and mirror inspection photo, from https://www.nasa.gov/history/30-years.... M100 before-and-after images: NASA; ESA/Hubble. Public NASA material; see the NASA media usage guidelines: https://www.nasa.gov/nasa-brand-cente... . NASA does not endorse this video. Sources: https://science.nasa.gov/mission/hubb... ; https://science.nasa.gov/mission/hubb... ; https://science.nasa.gov/humans-in-sp... ; https://esahubble.org/about/history/a... Narration: synthetic (AI) voice. No AI-generated images or video were used. The 1993 NASA TV footage is low resolution (archival). The spacewalk footage in the COSTAR section shows the fourth spacewalk; the box carried on the robot arm matches NASA's photo of COSTAR being removed from storage. No music. No NASA logo or insignia is used as a graphic in this video.