NASA Associate Administrator Dr. John Grunsfeld Testifies on Planetary Science

Fall Meeting 2012 Press Conference: Media Availability with John GrunsfeldПодробнее

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Dr. John Grunsfeld—Space Exploration and ResearchПодробнее

NASA New Horizons Principal Investigatory Dr. Alan Stern Testifies on Planetary ExplorationПодробнее

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John Grunsfeld - Astronauts Can Do Great Science - 23rd Annual International Mars Society ConventionПодробнее

Astronaut and Climber John Grunsfeld NASA's Hubble HuggerПодробнее

Astronaut John Grunsfeld talks about working on HubbleПодробнее

NASA Astronaut John Grunsfeld talks HubbleПодробнее

2023 U.S. Astronaut Hall of Fame® Weekend Astronaut Talk: John GrunsfeldПодробнее

Dr. James L. Green, director of NASA Planetary ScienceПодробнее

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