description John Grunsfeld Overview
John M. Grunsfeld is an American astrophysicist and former NASA astronaut who flew on five Space Shuttle missions. Three of those flights serviced the Hubble Space Telescope, and his spacewalks helped install or repair scientific instruments and supporting equipment. He later served as NASA's associate administrator for the Science Mission Directorate, overseeing the agency's scientific programs.
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John Grunsfeld scores 6.90/10 (Fair) on Lunoo, making it rated in the Astronomer category.
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