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In a month, the fastest solar cars will meet in Australia for a 14-hour race to determine the speediest sun-powered vehicle. After a disappointing finish in 2010, Stanford's team thinks they have what it takes

Peering deep into the sun's churning plasma, solar physicists have discovered a way to forecast the emergence of sunspots before they reach the solar surface.

When I was getting my solar panels installed, I couldn’t wait to see my electric meter literally spin backwards. [More]

The map of the solar system may be due for a little updating.

Scientists have found opal-like crystals in the Tagish Lake meteorite, which fell to Earth in Canada in 2000. This is the first extraterrestrial discovery of these unusual crystals, which may have formed in the primordial cloud of dust that produced the sun and planets of our solar system 4.6 billion years ago, according to a report in the Journal of the American Chemical Society.

Solar Sisters gives start-up funds--and a $500 "business-in-a-bag"--to door-to-door solar saleswomen, illuminating villages and offering exceptional economic benefits to communities. The ubiquitous AVON saleswomen traveled first by foot, then horse and buggy, and eventually by car to sell cosmetics door to door. In the process, the company built a global business that now earns $10 billion annually.

Solar panels give you clean energy, yes, but it turns out that's not all. Just by putting them on the roof, you'll start saving cash on your cooling and heating bills. Installing photovoltaic solar cells is a great way to easily tap into an environmentally-sustainable energy source, and in sunnier parts of the world it's even feasible to use them to actually make money by selling power back to the grid as part of a smart grid installation

An unmanned NASA probe made history 117 million miles from Earth on Saturday (July 16) when it arrived at the huge asteroid Vesta, making it the first spacecraft ever to orbit an object in the solar system's asteroid belt. The Dawn spacecraft entered orbit around Vesta after a four-year chase and will spend about a year studying the huge space rock before moving on to visit another asteroid called Ceres

Nanotechnology makes the seemingly impossible true: Trapping the sun's heat for release later, whenever and wherever you need it. MIT's researchers have discovered a way to blend carbon nanotubes , current media darlings of the chemistry world, with an existing material used for storing heat energy

One of the 10 commercial partnerships with home energy technology companies GE announced this week was SunRun, a home solar company. Now both companies are in the business of getting panels on people's roofs

Dark matter, inferred to exist from its gravitational effects on the universe, is still a mystery to scientists. But a new study says that dark matter could help life evolve and survive on distant worlds outside of our solar system.

The Voyager 1 spacecraft is poised to leave the solar system and reach interstellar space.

People love to prognosticate about how the world will power itself in the future. But only one person can be right. Here's some of the possible ways the next 50 years might turn out.

Now New Yorkers can see exactly how much solar power each roof could generate. Will that info spur solar installations like it has in other cities? It's hard to accurately predict how much power we can generate from the sun.

Google has poured hundreds of millions of bucks into clean power over the last few months. But their newest announcement isn't about utilities, it's about getting solar panels on as many houses as possible. Over the past few months, Google has become something of a clean energy superhero, making several investments, including a $168 million investment in California's Ivanpah solar farm and a $100 million investment in the world's biggest wind farm .