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" Regardless of what dreams you have, work very hard, play very hard, and have fun. "
John M. Grunsfeld
You
Dreams
Fun
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" The only reason Hubble works is because we have a space shuttle. "
John M. Grunsfeld
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Reason
Only
" Once in a while, the universe lets you be free alone and in peace. "
John M. Grunsfeld
Free
Peace
Alone
" 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. "
John M. Grunsfeld
Humanity
Science
Dream
" There's no question that if we stay on planet Earth and never leave, that eventually we'll be wiped out. "
John M. Grunsfeld
Earth
Leave
Never
" Sometimes astronauts feel a little ill or get minor scrapes. I trained as a crew medical officer to do basic treatment. "
John M. Grunsfeld
Astronauts
Medical
Feel
" If I could live in space, I would definitely do that. "
John M. Grunsfeld
Space
Would
If I Could
" Science at NASA is all about exploring the endless frontier of the Earth and space. "
John M. Grunsfeld
Space
Earth
Exploring
" I thrive with high-performance challenges in front of me. "
John M. Grunsfeld
Front
Challenges
Thrive
" 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
Work
Teacher
Love
" 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
Time
Work
You
" 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
Time
Life
Mission
" I have dedicated my life to answering the great scientific questions of our time and to the incredible adventure of space exploration. "
John M. Grunsfeld
Space
Time
Life
" A deep ocean under the icy crust of Ganymede opens up further exciting possibilities for life beyond Earth. "
John M. Grunsfeld
Life
Ocean
Possibilities
" 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
Work
Space
Home
" The best would be to fly in space with family and friends. "
John M. Grunsfeld
Would
Friends
Fly
" 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. "
John M. Grunsfeld
Perspective
Life
Science
" I'm an incurable romantic. But I'm not an adrenaline junkie. "
John M. Grunsfeld
Incurable
Romantic
Adrenaline
" 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
Sister
High School
School
" 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
Past
Home
Future
" Once we get beyond Mars, which formed from the same stuff as Earth, the likelihood that life is similar to what we find on this planet is very low. "
John M. Grunsfeld
Earth
Beyond
Find
" The truth is, every single rocket launch off of planet Earth is risky. "
John M. Grunsfeld
Launch
Earth
Rocket
" 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
Science
Space
Power
" After my spacewalks, I am quite exhilarated but also tired, similar to a workout on Planet Earth. "
John M. Grunsfeld
Planet
Workout
Am
" 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. "
John M. Grunsfeld
Me
Window
Space
" The moon's a nice place to visit, but you wouldn't want to live there. "
John M. Grunsfeld
You
Moon
Live
" 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
Space
Pretty
Me
" I kind of feel like I found my cause in life servicing the Hubble Space Telescope. "
John M. Grunsfeld
Like
Space
Kind
" 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. "
John M. Grunsfeld
Space
Always
Drive
" 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. "
John M. Grunsfeld
Find
Finding
Going
" Going to Mars would make NASA great again. "
John M. Grunsfeld
Mars
Great
Going