John M. Grunsfeld Quotes
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The Martian atmosphere is very thin. It's like our atmosphere at 100,000 feet.
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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.
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I think that space exploration as a broad activity is the most important things that humans can do. I've always found it fascinating, interesting, compelling, and I have a drive to go out into space.
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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.
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The truth is, every single rocket launch off of planet Earth is risky.
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The only reason Hubble works is because we have a space shuttle.
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To help enable the kind of science Hubble is performing makes my life worthwhile.
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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.
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There's no question that if we stay on planet Earth and never leave, that eventually we'll be wiped out.
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I'm an incurable romantic. But I'm not an adrenaline junkie.
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I got lucky and got assigned to Hubble.
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Getting a team of scientists on Mars could be transformative.
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The first thing to know about space food - it is the ambiance; it is the environment. It is not the food.
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When I grew up as a kid, we didn't know there were any other planets outside of our own solar system. It was widely speculated that planet formation was an incredibly rare event and that it's possible that other planets just don't exist in our galaxy, and it's just this special situation where we happen to have planets around our sun.
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I have had the privilege to be a member of many high-performance teams at NASA, both on and off the planet.
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I think it's really a sign of great American strength that we do invest the money we do in technology, in these hard projects, in NASA.
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At the age of six, I declared that I wanted to be an astronaut. My mother thought that was just fine, as it would encourage me to learn science, and besides, there really was no chance I would ever actually become an astronaut.
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The James Webb Space Telescope was specifically designed to see the first stars and galaxies that were formed in the universe.
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Growing up in Highland Park, in high school, I had some very influential teachers: I had a math teacher who taught calculus that helped me learn to be in love with mathematics; I had a chemistry teacher who inspired us to work what was in the class and to go beyond.
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A deep ocean under the icy crust of Ganymede opens up further exciting possibilities for life beyond Earth.
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Here we were, the only seven humans in space, repairing a telescope whose only purpose is to enrich the minds of people on planet Earth and increase our understanding of the workings of the universe. I can think of no better peaceful use of space for all humankind.
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The James Webb Space Telescope was specifically designed to see the first stars and galaxies that were formed in the universe. So we're gonna see the snapshot of when stars started. When galaxies started. The very first moments of the universe. And my bet? There's gonna be some big surprises.
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Absolutely the most fun thing to do in space and rewarding thing, in many ways, is to look back at planet Earth.
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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.