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" Science fiction has been an inspiration to generations of scientists and engineers, and the film series 'Star Wars' is no exception. "

John M. Grunsfeld

Science Fiction

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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. "

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

" After my spacewalks, I am quite exhilarated but also tired, similar to a workout on Planet Earth. "

John M. Grunsfeld

" I'm an incurable romantic. But I'm not an adrenaline junkie. "

John M. Grunsfeld

" Going to Mars would make NASA great again. "

John M. Grunsfeld

" Regardless of what dreams you have, work very hard, play very hard, and have fun. "

John M. Grunsfeld

" I thrive with high-performance challenges in front of me. "

John M. Grunsfeld

" Because of Hubble and other telescopes, we've now discovered that there are probably planets around every star, or virtually every star. There are solar systems around most stars. And the fact that we're here on a planet, Earth, means that it's likely there's lots of other Earths out there. "

John M. Grunsfeld

" 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. "

John M. Grunsfeld

" What we do at NASA is inspiring. It's reaching, it's visionary, and it inspires people on Earth to try hard things. "

John M. Grunsfeld

" Our country... invests a tiny fraction of 1 percent in NASA, and this is what's so amazing to me, is with that small investment, we do so much for the country. "

John M. Grunsfeld

" 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? "

John M. Grunsfeld

" Our journey in going beyond our home planet is a human endeavor, and in the greatest tradition of exploration, past, present, and future spacefarers will continue to be enduring catalysts for inspiration in our quest to unravel the mysteries of the universe. "

John M. Grunsfeld

" The biggest honor is to be an astronaut. It's such a tremendous privilege to be able to represent humankind in our quest to explore space. "

John M. Grunsfeld

" The best would be to fly in space with family and friends. "

John M. Grunsfeld

" The only reason Hubble works is because we have a space shuttle. "

John M. Grunsfeld

" The surface of Mars is bathed in ultraviolet light, bathed in radiation. Mars's magnetic field is essentially gone, so the surface of Mars is essentially sterilized. "

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

" When I grew up on the south side of Chicago, it was kind of a rough neighborhood, and when my parents saw the prospect of my older sister going to middle school, high school, they decided that we would move to the north side of Chicago, Highland Park, and for me, that was a whole new ballgame. "

John M. Grunsfeld

" 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. "

John M. Grunsfeld

" If I could live in space, I would definitely do that. "

John M. Grunsfeld

" I'm absolutely compelled for NASA to send international astronauts to Mars to find out if Mars ever harbored life. "

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

" As soon as I could ride a bike... I was always riding over to the Museum of Science and Industry to explore. It's where I first began to develop a fascination with machines and scientific principles. "

John M. Grunsfeld

" I don't particularly want to jump out of an airplane with a parachute if I don't have to. I don't want to go bungee jumping. I like adventure with a real purpose that I can buy into. "

John M. Grunsfeld

" A lot of people get home from work and sink into a good chair, the place in their life where they feel most comfortable. I get that comfort in space, the place where I most feel like I belong. "

John M. Grunsfeld

" 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. "

John M. Grunsfeld

" 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. "

John M. Grunsfeld

" It's pretty amazing to me that we have had a space shuttle program that's lasted for 30 years - for one space shuttle. That's quite an achievement. "

John M. Grunsfeld

" 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. "

John M. Grunsfeld