I hope there will be continued U.K. investment in human spaceflight to enable Britain to benefit from space travel in the longer term and that many more Britons - women and men - will travel into space.

If we want to travel into the future, we just need to go fast. Really fast. And I think the only way we're ever likely to do that is by going into space.

I think a lot of the American people feel more than a little disappointed that the high-water mark for human exploration was 1969. The dream of human space travel has almost died for a lot of people.

Most Jupiter-sized planets orbit the mother star in a highly elliptical orbit. This means they will often cross the orbit of any Earth-like planet and fling it into outer space, making life impossible. But our Jupiter travels in a near-perfect circular orbit, preventing a collision with any Earth-like planet, making life possible.

The president felt that it was important to send an ordinary citizen to experience the excitement of space travel as a representative for all Americans.

I've always been interested in the idea of space exploration. When I was younger it was just a dream, but the theory of rockets being able to travel through space was very much alive. I found it very exciting.

We've gotta reinvest in space travel. We should've never left the moon.

At the moment I'm doing this space movie, so I'm obsessed with physics and space travel. I know three months down the line it's gone. Then I'll be able to superficially say stuff about space.

For me, the Earth had always been a kind of a safe haven, you know, where I could go to work or be in my home or take my kids to school. But I realized it really wasn't that. It really is its own spaceship. And I had always been a space traveler.

On flights, I cannot travel economy class, as I am too huge to fit into that space. I always have to travel business class.

You don't look at the big problem all together, because I think it's a little intimidating. So you just take it one day at a time, meet the people who are going to meet with you, for you, and who you're going to work for, and really try to do the best job that you can. That's all teamwork, and that's what space travel is about.

What SF author or fan isn't interested in human space travel? I've yet to meet one.

Those are the kinds of roles you can really sink your teeth into. Characters with an edge. When you're playing someone who's sort of seedy, there's less limitation, there's so much space you can travel. There's room to move in.

We have one planet in our solar system that's habitable, and that's the Earth, and space travel can transform things back here for the better. First of all, by just having people go to space and look back on this fragile planet we live on. People have come back transformed and have done fantastic things.

I'm obsessed with the moon and space travel, so if I could incorporate that, I'd love to go to space.

Space travel is the only technology that is more dangerous and more expensive now than it was in its first year. Fifty years after Yuri Gagarin, the space shuttle ended up being more dangerous and more expensive to fly than those first throwaway rockets, even though large portions of it were reusable. It's absurd.

Rocket scientists agree that we have about reached the limit of our ability to travel in space using chemical rockets. To achieve anything near the speed of light we will need a new energy source and a new propellant. Nuclear fission is not an option.

Growing up in the '60s and early '70s, with the space flight and the Apollo program, I always loved planes. I always loved rockets and I always loved space travel.

Man is an artifact designed for space travel. He is not designed to remain in his present biologic state any more than a tadpole is designed to remain a tadpole.

In spite of the opinions of certain narrow-minded people, who would shut up the human race upon this globe, as within some magic circle it must never outstep, we shall one day travel to the moon, the planets, and the stars, with the same facility, rapidity, and certainty as we now make the voyage from Liverpool to New York!

Trees go wandering forth in all directions with every wind, going and coming like ourselves, traveling with us around the sun two million miles a day, and through space heaven knows how fast and far!

If you are in a spaceship that is traveling at the speed of light, and you turn on the headlights, does anything happen?

I'm not proud of it, but I'm a great liar when I travel. I smile and lie, and things are smooth.

I travel around the world, experiencing every language, every religion... some places where there's just no reason to smile, because their lives are so difficult.