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John M. Grunsfeld

physicist, astronomer, astronaut, mountaineer

1958

John Mace Grunsfeld is an American physicist and a former NASA astronaut. He is a veteran of five Space Shuttle flights and has served as NASA Chief Scientist. His academic background includes research in high energy astrophysics, cosmic ray physics and the emerging field of exoplanet studies with specific interest in future astronomical instrumentation. After retiring from NASA in 2009, he served as the deputy director of the Space Telescope Science Institute in Baltimore, Maryland. In January 2012, he returned to NASA and served as associate administrator of NASA's Science Mission Directorate (SMD). Grunsfeld announced his retirement from NASA in April 2016.

All Quotes by John M. Grunsfeld

“I believe that the future of humans, and the future of Earth, depends on space exploration. That's not a French problem, or a problem for Alabama: it's a planet-wide problem. International cooperation is crucial.”
— John M. Grunsfeld
“There is no stronger case for the motivational power of real science than the discoveries that come from the Hubble Space Telescope as it unravels the mysteries of the universe.”
— John M. Grunsfeld
“There is no stronger case for the motivational power of real science than the discoveries that come from the Hubble Space Telescope as it unravels the mysteries of the universe.”
— John M. Grunsfeld
“I believe that the future of humans, and the future of Earth, depends on space exploration. That's not a French problem, or a problem for Alabama: it's a planet-wide problem. International cooperation is crucial.”
— John M. Grunsfeld
“Hubble isn't just a satellite; it's about humanity's quest for knowledge.”
— John M. Grunsfeld
“Sometimes astronauts feel a little ill or get minor scrapes. I trained as a crew medical officer to do basic treatment.”
— John M. Grunsfeld
“Hubble isn't just a satellite; it's about humanity's quest for knowledge.”
— John M. Grunsfeld
“All space exploration is risky. As an astronaut, I had to decide each and every time I went to space whether or not to risk my life for the mission.”
— John M. Grunsfeld