It is foolish to claim, as some do, that emigration into space offers a long-term escape from Earth's problems. Nowhere in our solar system offers an environment even as clement as the Antarctic or the top of Everest.

I hope that by 2050 the entire solar system will have been explored and mapped by flotillas of tiny robotic craft.

We should be ready to reach out beyond our planet and beyond our solar system to find out what is really going on out there.

The purpose of going to Mars is for humans to first begin to occupy, permanently, another planet in the solar system. The astronauts or pilgrims, whatever you might call them, are going to be very historically unique human beings.

It's time for the human race to enter the solar system.

The Moon and Mars were the two most likely candidates for life in the solar system; what exists beyond our solar system is mere guesswork.

As far as I'm concerned, Enceladus has become the go-to place in our solar system for issues bearing on extraterrestrial life. It's a great place to examine extraterrestrial organic chemistry that is water-based and, therefore, like biotic chemistry on Earth.

We may regard the solar systems as separate sponges, swimming in a World of Divine Spirit, and thus it will be apparent that in order to travel from one solar system to another, it would be necessary to be able to function consciously in the highest vehicle of man, the Divine Spirit.

Our solar system is actually a wild frontier, teeming with different, diverse places: planets and moons, millions of objects of ice and rock.

Going to the Kuiper Belt is like an archaeological dig into the history of the solar system.

I'm absolutely positive about human survival. We will continue to develop our civilisation and expand not just on Earth, but also across the solar system, the galaxy, even the entire universe.

The public has an incredible capacity for appreciating the wonder of our planet, our solar system, our universe.

Let's find a new way to think about the entire taxonomy of solar system objects, and not clutch to this concept of 'planet,' which, of course, only ever meant, 'Do you move against the background stars, regardless of what you're made of?'

I read 'The High Frontier' in high school. I read it multiple times, and I was already primed. As soon as I read it, it made sense to me. It seemed very clear that planetary surfaces were not the right place for an expanding civilization inside our solar system.

There's life all over this universe, but the only life in the solar system is on earth, and in the whole universe we are the only men.

When Hubble was launched, it became clear very shortly thereafter that there was a problem with the optics.The mirror was not quite the right shape. And the one program that I had really been looking forward to doing with Hubble was studying outer planets in our solar system, the planets Uranus and Neptune.

I wanted to be a snowplow driver when I was a kid. Growing up in the Rocky Mountains, that's the most glorious job you can imagine. But then my mother took me to a lecture about the solar system when I was 8, and I got hooked.

In 'Cosmicomics,' I came close to science fiction - I was inspired by cosmological subjects and the workings of the universe and invented a character who was a sort of witness to everything that was happening inside the solar system.

I am humbled and excited by new opportunities for me to support and share the amazing work NASA is doing to help us travel farther into the solar system and work with the next generation of science and technology leaders.

I felt like I might as well have been living in another part of the solar system.