Quotes from John M. Grunsfeld

The team at the Space Telescope Science Institute has a demonstrated record of meeting the high-performance challenges of operating the Hubble Space Telescope and preparing for the James Webb Space Telescope.

I kind of feel like I found my cause in life servicing the Hubble Space Telescope.

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.

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.

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

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.

The first thing to know about space food - it is the ambiance; it is the environment. It is not the food.

Hubble isn't just a satellite; it's about humanity's quest for knowledge.

The Martian atmosphere is very thin. It's like our atmosphere at 100,000 feet.

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

One of the things that happens in space is that there is a fluid shift. You get a lot of extra pressure, and it fills your sinuses, and the horseradish is a miracle worker for cleaning that out.

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

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

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.

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

Hubble showed us the marvel and majesty of stars being born.

I got lucky and got assigned to Hubble.

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.

The '60s were a remarkable time because several things were happening at once. Men were leaving planet Earth, kids were breaking into the television age, and I was able to see Neil Armstrong walking on the moon.

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

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

To help enable the kind of science Hubble is performing makes my life worthwhile.

There are some things worthy of risking your life for.

Getting a team of scientists on Mars could be transformative.