John M. Grunsfeld Quotes
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We're being very careful that we don't send a spacecraft to Mars with the intention of detecting Martian life - and find out that we detected the Earth life that we took with us.
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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.
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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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I can't imagine anywhere I'd rather be than outside the space shuttle in my space suit next to the Hubble Space Telescope.
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I have dedicated my life to answering the great scientific questions of our time and to the incredible adventure of space exploration.
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I thrive with high-performance challenges in front of me.
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Hubble showed us the marvel and majesty of stars being born.
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Hubble isn't just a satellite; it's about humanity's quest for knowledge.
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Asteroid detection, tracking, and defense of our planet is something that NASA, its interagency partners, and the global community take very seriously.
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After my spacewalks, I am quite exhilarated but also tired, similar to a workout on Planet Earth.
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Sometimes astronauts feel a little ill or get minor scrapes. I trained as a crew medical officer to do basic treatment.
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Science at NASA is all about exploring the endless frontier of the Earth and space.
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I grew up on the south side of Chicago in the 1960s, and I think there was a synchronicity of events that inspired me to be an astronaut, and, of course, the backdrop is nothing less than Mercury, Gemini, and Apollo. That was a time in our nation where we aspired to great things, and we achieved them.
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I see no difference between scientific exploration and human exploration.
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What we do at NASA is inspiring. It's reaching, it's visionary, and it inspires people on Earth to try hard things.
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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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Being an astronaut, there are not a lot of things that have really shocked me in my life.
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We need to move off the planet. And Mars is the next best place.
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The moon's a nice place to visit, but you wouldn't want to live there.
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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.
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There are some things worthy of risking your life for.
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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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Small bodies in our solar system, like comets and asteroids, help us understand how the solar system formed and provide opportunities to advance exploration.
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Regardless of what dreams you have, work very hard, play very hard, and have fun.