American - Astronaut | October 10, 1958 -
Are we alone? Many, many people on planet Earth want to know. We are on the cusp of being able to answer that question... because of the investments we're making in space technology.
John M. Grunsfeld
TechnologyAloneSpacePeopleEarth
A deep ocean under the icy crust of Ganymede opens up further exciting possibilities for life beyond Earth.
LifeOceanDeepPossibilitiesEarth
I see no difference between scientific exploration and human exploration.
ExplorationHumanDifferenceSee
There's a perspective that I've gained as an astronaut that I didn't get from my science activities. In my science activities, I learned by the seat of my pants. Spending 17 years as an astronaut, I learned the NASA formalism of systems engineering as if my life depended on it. Literally.
LifeSciencePerspectiveMy LifeGet
The most striking thing to me about human space flight and my own personal experience is that I've seen dramatic changes on Earth. We humans are rapidly changing the planet. I've watched Amazonia as the rainforest has been cut down. That's something I've seen out the window. I'm very worried about that.
ExperienceSpaceMeWindowDown
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.
FutureSpaceBelieveProblemEarth
We don't know how many planets we're going to have to examine before we find life, and not finding it on 10 or 100 doesn't mean it's not there. This may be very tricky.
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I kind of feel like I found my cause in life servicing the Hubble Space Telescope.
LifeSpaceFeelKindLikeCause
The Hubble Space Telescope, which was designed for extreme servicing, you know, we can fix everything. And the James Webb Space Telescope, where we can fix nothing. It has to work the first time. And it's a very complicated telescope.
WorkTimeSpaceYouComplicatedFix
Hubble uniquely has been able to look in the atmosphere of a planet orbiting a nearby star and figure out what's in that atmosphere.
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When I first went to Hubble, as an astronomer and as a scientist, it was a dream come true. And as an astronaut, the Hubble missions are premiere missions because Hubble is so important to science, so important to humanity, that it's just a very special event. But as an astronomer, it was sort of the holy grail of missions.
ScienceHumanityDreamTrueSpecial
Only by studying large numbers of people can we figure out, are astronauts dying at a higher rate of cancer, and what types of cancers, than other people?
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