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Jeff Sachs has the Millennium Villages. He spends $2.5 million in one village. It's an absolutely ridiculous model, because I've said that if you gave me $2.5 million, I can train 100 grandmothers, solar electrify 100 villages - 10,000 houses - and save you 100,000 litres of kerosene.
The solar probe is going to a region of space that has never been explored before. It's very exciting that we'll finally get a look. One would like to have some more detailed measurements of what's going on in the solar wind. I'm sure that there will be some surprises. There always are.
Because of climate changes, it's not just a question of producing energy. It's a question of producing energy in a way that we can live with in the long term. If you look at the available pieces, from conservation to nuclear, solar, whatever, and you put them all together, we can't do it.
A century ago, scientists believed there was only one obvious stomping ground for alien biology in our solar system: Mars. Because it was reminiscent of Earth, Mars was assumed to be chock-a-block with animate beings, and its putative inhabitants got a lot of column inches and screen time.
In the United States alone, 450 billion square feet of glass facade is produced every year. What if we could take this chance to use the glass to harness solar energy and allow the architecture to respond to the light and heat of the sun, to create photosynthesis and generate solar energy?
Once solved, the severe handicaps imposed on space exploration by the weight and chemical limitations of rockets would no longer apply. The whole timetable of our conquest of the planets in our solar system would be tremendously speeded up, from hot Mercury all the way out to frigid Pluto.
The cosmos is three times as old as Earth. During most of creation's 14 billion year history, our solar system wasn't around. Nonetheless, the early universe still had the right stuff for life, and contained worlds that were just as suitable for spawning biology and intelligence as our own.
The world, when you look at it, it just can't be random. I mean, it's so different than the vast emptiness that is everything else, and even all the other planets we've seen, at least in our solar system, none of them even remotely resemble the precious life-giving nature of our own planet.
Because of Hubble and other telescopes, we've now discovered that there are probably planets around every star, or virtually every star. There are solar systems around most stars. And the fact that we're here on a planet, Earth, means that it's likely there's lots of other Earths out there.
I think God has blessed this country with enormous natural resources, and we should pursue all of the above. We should be developing oil, and gas, and coal, and nuclear, and wind, and solar, and ethanol, and biofuels. But, I don't believe that Washington should be picking winners and losers.
I hope climate science becomes the big thing. And then what I want is electrical engineers to solve the world's energy problems, energy distribution problems. I want mechanical engineers to make better transportation systems. I want chemical engineers to develop better solar panels, and so on.
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.
Sometimes it's like that. I go, 'You know what? I'm going to just change scales. I'm going to even change instruments. And I'm going to go into the chromatics of the Spanish language,' and I do. You know, the poem is totally different. It's like a lunar voice versus a day voice, a solar voice.
It's feasible that we'll meet other sentient life forms and conduct commerce with them. We don't now have the technology to physically travel outside our solar system for such an exchange to take place, but we are like Columbus centuries ago, learning fast how to get somewhere few think possible.
I think, in a lot of places, the solar panels are a badge of honor; they're trendy. If you go to Hawaii or Japan, people even install fake solar panels because it's cool and it's popular. And so I think solar panels have gotten a lot more attractive. They're sleek, black, they look good on a roof.
Energy legislation in Congress and the focus on energy legislation is first and foremost about creating good jobs. In Florida, where solar and biofuel and wind and so many other areas are important and so many in the private sector continues to pursue these, we need policies that will encourage that.
I don't think Brian Cox does 'The Wonders of the Solar System' because he believes the world would be a better place if people understood about the rings of Saturn; I just think he finds physics extremely interesting. It brings him joy, and he wants to spread the love. I feel the same about economics.
I was inspired to see leaders from Paris, New York City, San Francisco and Vancouver, B.C. rolling up their sleeves to create clean and safe transportation systems; make homes and buildings efficient, comfortable and affordable; and ensure more of our energy comes from clean sources like wind and solar.
Voyager found Saturn to be a planet with a complex interior, atmosphere, and magnetosphere. In its rings - a vast, gleaming disk of icy rubble - the mission recorded signs of the same physical mechanisms that were key in configuring the early solar system and similar disks of material around other stars.
The Moon is a ball of left-over debris from a cosmic collision that took place more than four billion years ago. A Mars-sized asteroid - one of the countless planetesimals that were frantically churning our solar system into existence - hit the infant Earth, bequeathing it a very large natural satellite.
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.
If I were to do a foundation, it would be to promote solar energy. And I'm worried about drilling for oil. I think it is harming the earth, 'cos it drains the layer of oil under the surface, and that could be causing earthquakes. It's like we're giving the earth arthritis. I don't know if that sounds crazy.
Solar makes electricity expensive for two inherently physical reasons. Sunlight is dilute, requiring 10 to 15 times as much materials and mining, and up to 5,000 times more land, than non-renewables. And sunlight is unreliable, which reduces the value of solar as it becomes a larger part of energy supplies.
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.
The Fuse is a solar energy station in orbit 22,000 miles above the earth. But it's more than just a big solar panel array. The Fuse is also home to Midway City, a technically illegal settlement that grew out of a bunch of engineers who decided they'd rather make a new life in space than return home to earth.
In the years after the expedition to Chad, I started the Honnold Foundation, a small nonprofit that was my attempt to do something positive in the world. I sought out projects that both helped the environment and improved peoples' standards of living. The more I researched, the more I gravitated toward solar.
If you were to stand on an asteroid in the main belt of asteroids between Mars and Jupiter in our solar system, you might be able to see one or two asteroids in the sky, but they would be very far away and very, very small. So you wouldn't have this 'dodging through tons of rocks' business you get in the movies.
I do not expect NASA to go out and build settlements and colonies. I do not expect them to give SpaceX all the money needed to colonize Mars. I do not expect them to realize the future of humanity is contingent on harvesting the wealth of the solar system overnight and suddenly subsidize my asteroid mining project.
Consumers used to think they had to compromise with solar. It was, 'Okay, I'm doing the right thing for the environment; it's cool to see the panels. I have to compromise on the cost and convenience side.' And now they no longer have to. On the cost side, it's cheaper, and on the convenience side, we set it all up.
I gained a first class degree in Physics at Imperial College London in 1968 and did research in solid state physics, but did not pursue meteorology matters until gaining an M.Sc. in astrophysics from Queen Mary College London in 1981, after which I investigated and attempted to construct theories of solar activity.
I've been thinking a lot about space. It was one of those slow-motion realisations how little we are, how far we are from everything else in our solar system. This idea of distance started kind of haunting me. How do you go forth and accomplish things but not end up leaving everything you started out with in the dust?
America is home to the best researchers, advanced manufacturers, and entrepreneurs in the world. There is no reason we cannot lead the planet in manufacturing solar panels and wind turbines, engineering the smart energy grid, and inspiring the next great companies that will be the titans of a new green energy economy.
Cassini was an international undertaking, led by NASA and the European Space Agency and designed to be, in every dimension, a dramatic advance over Voyager. At the size of a school bus, it was bigger than Voyager and outfitted with the most sophisticated scientific instruments ever carried into the outer solar system.
When I was a kid, I was obsessed with different planets in the solar system, and I used to create, for every single planet, a different alien race with a certain kind of pet, a certain kind of house, a certain kind of water system, and everything. I would draw these pictures. I had hundreds of these pictures in a box.
This is what the Mars Science Laboratory (MSL) represents. Experimental, explorational science. Learning about Mars as a new world. Discovering new things that will tell us about the history of our solar system, help reveal the secrets of life, and continue blazing the trail that may someday be traveled by the rest of us.
In reality, Republicans have long been at war with clean energy. They have ridiculed investments in solar and wind power, bashed energy-efficiency standards, attacked state moves to promote renewable energy and championed laws that would enshrine taxpayer subsidies for fossil fuels while stripping them from wind and solar.
Germany has a lot of solar power. In fact, in 2005, some 55 or 57 percent of worldwide installations were photovoltaics in Germany. That's 57 percent of all worldwide solar photovoltaics. Because of the high feed-in tariff, they have a way of allowing you to produce electricity and ship it into the grid at very high prices.
The cosmic game changed forever in 1992. Before then, logic told us that there had to be other planets besides the nine (if you still count poor Pluto) in our solar system, but until that year, when two astronomers detected faint, telltale radio signals in the constellation Virgo, we had no hard evidence of their existence.
Asteroids are deep-space bodies orbiting the Sun, not the Earth, and traveling to one would mean sending humans into solar orbit for the very first time. Facing those challenges of radiation, navigation and life support on a months-long trip millions of miles from home would be a perfect learning journey before a Mars trip.
Discovering that our solar system has many more planets than we ever expected, and that most of them are ice dwarfs rather than like Earth and the other rocky terrestrials, is just another step in the revolution in viewpoint that removed the Earth from the center of the physical universe and makes Earth all the more special.
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.
There's no doubt that the search for planets is motivated by the search for life. Humans are interested in whether or not life evolves on other planets. We'd especially like to find communicating, technological life, and we look around our own solar system, and we see that of all the planets, there's only one that's inhabited.
'Easter' is a movable event, calculated by the relative positions of sun and moon, an impossible way of fixing year by year the anniversary of a historical event, but a very natural and indeed inevitable way of calculating a solar festival. These changing dates do not point to the history of a man, but to the hero of a solar myth.
The majority of America wants action on climate change. The majority of America thinks we should regulate carbon dioxide as a pollutant. And the majority of America thinks we should prioritize solar and wind infrastructure over fossil fuels. Those are impressive majorities, ones that every office seeker and office holder should heed.
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.
Just as our solar system has a certain idiosyncratic assortment of planets and moons, different from any neighboring system yet categorically equivalent, so each distinct period of human history might have special qualities and individuals, characteristics and events, yet still be essentially akin beneath the surface to all the others.
It changes your perspective to be able to look out the window and see the planet. One of the thoughts that I had when I first got up here was, 'We really do live on a planet, and we are in a solar system, and we are flying through space right now.' I mean, this is something that you know, obviously, but to see the planet - it's amazing.
Yes, sunny Nevada is an ideal state for solar power. As it gets cheaper, the state should use solar whenever it makes financial sense. But politicians shouldn't force you to buy it regardless of cost. It doesn't make sense to insert into the state constitution a requirement on energy use that locks Nevada into 50 percent wind and solar.
We can learn from all around the world. Germany, particularly, has been successful with rooftop solar generation. Other countries like Norway and Sweden have done work on it. Some of them have done offshore wind projects. So we're looking at learning from the best from all across the world. My approach is to get the best out of each one.
We really just didn't realize the diversity of planetary types in our solar system. Pluto looked like a misfit because it was the only one we saw. And just as a Chihuahua is still a dog, these ice dwarfs are still planetary bodies. They're large enough to make themselves round by self gravity, and they surely pass the test of planethood.