There are thousands of asteroids whose orbit in the Solar System crosses that of Earth. And we have a little acronym for them - NEOs: near Earth objects. And our biggest goal is to try to catalogue them, so we know in advance if one is going to put us at risk.
With the right infrastructure in place, home solar will be recognized publicly as affordable, easy, and smart, and every new home built in the developed world can have clean energy sources built into it.
I have no doubt that we will be successful in harnessing the sun's energy. If sunbeams were weapons of war, we would have had solar energy centuries ago.
For example, a breakthrough in better batteries could supplant hydrogen. Better solar cells could replace or win out in this race to the fuel of the future. Those, I see, as the three big competitors: hydrogen, solar cells and then better batteries.
You know, there was a time, just before I started to study physical science, when astronomers thought that systems such as we have here in the solar system required a rare triple collision of stars.
It's my view that solar energy may be the ultimate solution for energy for most of the world. I believe, based on what little I know about it, that there is a possibility of a breakthrough.
We are talking about institutionalizing a program on solar development that will outlast the Obama administration.
Solar power is clean, renewable and cost effective, but it also needs time to develop.
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.
Our customer base isn't just people saying, 'I'm an environmentalist, I'm in my Birkenstocks, I went to Woodstock.' Solar is a bipartisan technology. Republicans like solar; conservatives like solar. Over 30% of our customers are veterans. There's something very American about being able to produce power on your own rooftop.
Terraforming our moon will take many decades and vast abilities. Before we can begin, we'll have to master the resources of our solar system - especially transporting raw masses over interplanetary distances.
I've had experiences in my life that leave no doubt in my mind about the fact that God exists. I'm quite willing to debate people who don't think so because I want them to explain to me how did our solar system get so organized and how is the universe so complex and yet well-organized that we can predict 70 years hence when a comet is coming?
It might be arrogant to think that we're the only living creations in all of the solar systems that there are. Space is so vast.
We need to take command of the solar system to gain that wealth, and to escape the sea of paper our government is becoming, and for some decent chance of stopping a Dinosaur Killer asteroid.
Proof of the black hole is a tremendous amount of mass inside a very small volume. There's 4 million times the mass of our sun within a region that's comparable to the size of our solar system.
Of all the planets apart from Earth in our solar system, Mars is the most hospitable. Yeah. Right. Better keep my visit short. And yet, despite the discomfort, the danger, I love it here. I love coming back for these imaginary vacations. The sights are amazing.
Even if we didn't have greenhouse gases, were going to have to move away from fossil fuels, as we're going to run out. They're finite, whereas solar and wind are infinite.
It is more likely that more than a century will pass before we know the structure of the chemical atoms as thoroughly as we do our solar system.
You have to work with the auto industry, the oil companies, you have to work to develop renewable fuel, whether it's solar or different kinds of fuel or whatever.
Try everything. Do everything. Nuclear. Biomass. Coal. Solar. You name it. I support them all.
Most of the dogmatic religions have exhibited a perverse talent for taking the wrong side on the most important concepts in the material universe, from the structure of the solar system to the origin of man.
Solar power is the last energy resource that isn't owned yet - nobody taxes the sun yet.
I assume we will have figured out a way to efficiently utilize solar energy and tied that to an efficient way to use nuclear energy in such a way that it doesn't pose a serious environmental issue.
The romantic appeal of solar sailing has ensured that its advocates consistently come from the worlds of both science fiction and science fact.
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.
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.
Our solar system is actually a wild frontier, teeming with different, diverse places: planets and moons, millions of objects of ice and rock.
Man must at all costs overcome the Earth's gravity and have, in reserve, the space at least of the Solar System.
Even though I love solar and love wind, like most people do, I like the renewable sources, they alone are not going to get America energy independent.
If China is helping its domestic industries charge an artificially low price for solar panels and other environmental goods, then China is violating international trade rules that it agreed to when it became a member of the World Trade Organization.
It's time for the human race to enter the solar system.
Mostly, I spend my time being a mother to my two children, working in my organic garden, raising masses of sweet peas, being passionately involved in conservation, recycling and solar energy.
My best friend Rosemarie and I had a very involved secret life when we were in elementary school. After we saw 'The Day the Earth Stood Still' on TV, we invented a whole secret life in which we were twins from the planet Venus, and we were in charge of the entire solar system as well as Earth.
If you want to help Africa, you should help them out of poverty, not try to build solar cells and windmills.
Look at countries like China, they are determined to dominate all clean technology areas, putting lots of money into wind, solar, electric vehicles and battery storage. America's political impotence, caused by their terrible partisanship, will see them left behind.
I'd love to go into space again if there were a mission to Mars. I'd also love to go to a completely different planetary system, out of our solar system.