The images of Earth's delicate biosphere, contrasting with the sterile moonscape where the astronauts left their footsteps, have become iconic for environmentalists: these may indeed be the Apollo programme's most enduring legacy.
It is only by freeing NASA from routine human transport to low-Earth orbit that we can afford to once again see American astronauts exploring distant worlds.
I know other astronauts share my feelings.... And we know the government is sitting on hard evidence of UFOs.
We don't have parades for mathematicians, we have parades for astronauts. You don't think about all the thousands of people who worked on that capsule and crunched the numbers and were integral in getting that into space.
I'm absolutely compelled for NASA to send international astronauts to Mars to find out if Mars ever harbored life.
Things felt pretty crazy on earth in 1969, but the cosmos was friendly. Astronauts had round-trip tickets; they got home.
Some astronauts sleep in sort of beds - compartments that you can open up and crawl into and then close up, almost like a little bedroom.
On a standard space shuttle crew, two of the astronauts have a test pilot background - the commander and the pilot.
I’m not a risk taker. But astronauts are professionals, so you get out on the field and play ball. I tried to take it in stride because that’s what I had to do to get into space. That’s where I belong, and I’m pretty good at it.
The pressure suit helps if something goes wrong during launch or re-entry - astronauts have a way to parachute off the shuttle. The suits protect you from loss of pressure in case of emergency.
Golf camaraderie, like that of astronauts and Antarctic explorers, is based on a common experience of transcendence; fat or thin, scratch or duffer, we have been somerwhere together where non-golfers never go.
Like other kids wanted to become firemen or astronauts, I wanted to make people laugh.
On a sunny Tuesday - for it seems so many awful things happen on a Tuesday - six astronauts and one schoolteacher attempted to pierce the sky. Instead they touched the stars.
The food isn't too bad. It's very different from the food that the astronauts ate in the very early days of the space program.
And not only that but... when the station is completed, there will be an international crew made of astronauts coming from different cultural experiences, speaking different languages, but working together for a common goal.
If you look at astronauts closely, their eyes look kind of puffy. And it gives you this mild headache. But one of the advantages of that, if you will.
Mars missions will require up to three years in reduced gravity, so we need to make sure astronauts can not only survive but thrive as they move outward to explore this new world.
I've always been a bit of a space geek. I wrote an article years ago about the neutral buoyancy tank, which is this biblically sized pool where they train astronauts. And it was just the coolest thing.
Ever since the environmental movement was sparked by photos of the whole Earth taken by astronauts onboard Apollo Lunar Modules, I've seen planetary exploration as an extension of a reverence and care for Earth.
Astronauts are like these mythic legends, but really, they are just regular people, people who wear chinos.
From day one, I have been told I am no different from the male astronauts. As a pilot, I flew in the sky. Now that I am an astronaut, I will fly in space.
We hope to create thousands of astronauts over the next few years and bring alive their dream of seeing the majestic beauty of our planet from above, the stars in all their glory and the amazing sensations of weightlessness and space flight.
I believe that there will be women astronauts sometime just as there are women airplane pilots.
All astronauts have degrees in science, engineering, or medicine, but other than that, there's no one path to NASA. The one thing everyone has in common is we've all exceled in our chosen field.
At no time, when the astronauts were in space were they alone, there was a constant surveillance by UFOs.
I believe that these extra-terrestrial vehicles and their crews are visiting this planet from other planets. Most astronauts were reluctant to discuss UFOs.
Different astronauts sleep in different ways.
My dad and my mom convinced me to go into biomedical engineering because they said astronauts going to Mars will need life support systems.
Welcome to President Bush, Mrs. Bush, and my fellow astronauts.
There are no wishy-washy astronauts. You don't get up there by being uncaring and blase. And whatever gave you the sense of tenacity and purpose to get that far in life is absolutely reaffirmed and deepened by the experience itself.
Ancient astronauts didn't build the pyramids. Human beings built the pyramids, because they're clever and they work hard.
I remember when I was 12, talking with my friends about what we wanted to do with our lives, astronauts, forensic detectives, all these different jobs. And the only thing I could think was an actor.
It's almost comical that astronauts are stereotyped as daredevils and cowboys. As a rule, we're highly methodical and detail-oriented. Our passion isn't for thrills but for the grindstone, and pressing our noses to it.
During my 8 years as chairman, I had the privilege to peer into the future to see dynamic citizen astronauts returning to and from the heavens which we can expect in the future.
All astronauts, even civilians like me without pilot experience, have to learn how to co-pilot a jet called a T-38.
So most astronauts getting ready to lift off are excited and very anxious and worried about that explosion - because if something goes wrong in the first seconds of launch, there's not very much you can do.
Ben Affleck (who plays A.J. Frost) and I got to actually go into the neutral buoyancy tank in actual $10 million spacesuits the astronauts wear in outer space, and that was pretty interesting
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?
When young girls can get 400,000 likes by doing a sexy selfie... we have to offer them another way of being. To dream of being female astronauts, engineers or presidents.
Most astronauts are very down-to-earth people. Many of us, three-quarters, have an engineering degree, and we have a very Cartesian, rational approach to things.
The majority of astronauts have to change their eyeglasses while in space. They bring eyeglasses with them and typically change a few months into the mission.
Nothing focuses your mind quite like flying a jet. That's one reason NASA requires that astronauts fly T-38s: it forces us to concentrate and prioritize in some of the same ways we need to in a rocket ship.
I was only a hero by default. The flights were few and far between. There weren't that many astronauts. The moon flights were so interesting and exciting.
I've met a lot of the astronauts, which was such an incredible experience. They're all very macho guys, like fighter pilots, but then there's a mysticism about them.
Being in space is amazing - it's the reason we all become astronauts - but you also have to love what you're doing on the ground, since that's how you'll spend most of your time.
Astronauts were not the impulsive daredevils so dear to the stereopticonloving public. They couldn't afford to be. The hazards of the profession required an infinite capacity for cautious, contemplative thought.
The workouts have positively impacted the astronauts' bones and muscles, and they are coming back in really good shape. But some are losing bone and muscle but not as much as we saw in the early days.
While we've taken seeds into space, and astronauts on the International Space Station have eaten lettuce they've grown, we haven't produced fruit in space, so we can't pollinate something.
Astronauts working for the government will always need to be either pilots or mission specialists. Those who want to be pilots should have military experience - ideally, a test pilot background.
Most people here don't have a wide emotional range. It's just the type of people astronauts are, they're required to be level.
NASA appreciates the efforts of Congress to resolve restrictions placed on our partnership with Russia. Congress' action helps to ensure the continuous presence of U.S. astronauts on the International Space Station.
When many astronauts go to space, they see the insignificant size of the earth and vastness of space, and they become very religious, because they have seen the Signs of Allah.
After analyzing the sanctions against our space industry, I suggest to the USA to bring their astronauts to the International Space Station using a trampoline.
Some of the senior people, the very senior astronauts, shook my hand and said, 'K.C., you did a great job. Don't let anyone tell you different.'
The 20-G Centrifuge is our largest facility certified for use by humans. Its capabilities make it a unique NASA resource and a very versatile research tool that is ideal for developing health-maintenance activities for astronauts.
While I'm not a celebrity, it's such a weird concept that society has cooked up for us. Astronauts and teachers are much more amazing than actors.
I think most astronauts are not risk takers. We take calculated risks for something that we think is worthwhile.
Some astronauts describe the routine flushing of urine into space, where the freezing temperatures turn the droplets into a cloud of bright, drifting crystals, as being among the most amazing sights they saw on an entire voyage.
I'm Chinese-American, of course, and so it's very interesting to see China actually launch their own astronauts, becoming the third nation, following the United States and Russia, to do so.
Where is everybody? Humans could theoretically colonize the galaxy in a million years or so, and if they could, astronauts from older civilizations could do the same. So why haven't they come to Earth?
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