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Topic: sun
Using seawater and sunlight to grow sustainable food in the desert
Australia's Sundrop Farms uses sunlight to desalinate seawater. The resulting fresh water is used and re-used to power and irrigate four hydroponic greenhouses with 175,000 tomato plants in each. Those sustainable yea...
The Solar Grandmothers of Ambakivao, Madagascar
Not having access to electricity, life in Ambakivao, Madagascar was dark. A group of grandmothers decided to change that, bringing light to their community by becoming the village’s first solar engineers. With the hel...
How NASA’s Parker Solar Probe Will Touch the Sun
In the early hours of August 12, 2018, NASA's Parker Solar Probe launched from Florida's Cape Canaveral Air Force Station, beginning a historic seven-year journey to 'touch the sun.' From The New York Times: The P...
The World in UV
See The World in Ultraviolet, a similar but strange view compared to what our human eyes perceive in the visible spectrum. In this Veritasium video, Derek Muller explores how the ultraviolet makes eyeglasses, flowers,...
A lemon-powered supercar and making the world’s largest lemon battery
Can you power an electric supercar with lemon-power? It depends on the lemon-power. In the video above, science YouTuber and former NASA JPL engineer Mark Rober attempts to fill a 48-kilowatt-hour battery with electri...
Does ‘the ozone hole’ hold the secret to fixing climate change?
We don’t hear much about 'the hole' in the ozone layer anymore. That’s because we’ve all but fixed it, thanks to consumer choices and a massive international agreement called the Montreal Protocol. Can we learn anythi...
Shadows On Other Worlds
Explore the wonder of light from our star, the Sun, and how Shadows On Other Worlds, like on Venus or a faraway planet orbiting the red star Glise 581, would behave a little differently than they do here on Earth. Thi...
The Aurora Named STEVE
For the first time, scientists have ground and satellite views of STEVE (short for Strong Thermal Emission Velocity Enhancement), a thin purple ribbon of light. Scientists have now learned, despite its ordinary name, ...
Where does Space begin?
How far away is Space from where you are at this moment? How much closer is it when you're flying in a plane? And how close is the International Space Station to Earth if we can spot it in the sky? Travel up, up, u...
How to Make Tomato Paste in Sicily
At the end of last summer I spent five glorious days in Sicily learning how to put sunshine in a jar. It’s easy. Take a ridiculously large amount of perfectly ripe Sicilian tomatoes. Cut them up. Leave them in the sun...
The North Wind and the Sun: A Fable by Aesop
Once the North Wind and the Sun were arguing about who was the stronger. They saw a man walking below. "I am the strongest," said the North Wind fiercely. "Only I can get the coat off that man." But the sun, answering...
How to Find a Living Planet
The more we see other planets, the more the question comes into focus: Maybe we're the weird one? Decades of observing Earth from space has informed our search for signs of habitability and life on exoplanets and even...
How did Polynesian wayfinders navigate the Pacific Ocean?
Imagine setting sail from Hawaii in a canoe. Your target is a small island thousands of kilometers away in the middle of the Pacific Ocean — a body of water that covers more than 160 million square kilometers. For tho...
How do solar panels work?
The Earth intercepts a lot of solar power: 173,000 terawatts. That’s 10,000 times more power than the planet’s population uses. So is it possible that one day the world could be completely reliant on solar energy? ...
The 2017 Solar Eclipse from the shores of Palisades Reservoir, Idaho
Stand on the shores of Palisades Reservoir, Idaho as the moon's shadow passes over you and the crowds around you cheer. This awe-inspiring moment of totality, when a new moon blocks the sun's light during a solar ecli...
Eclipses Throughout Our Universe – Out There
An exercise in cosmic geometry. A reminder that we live on one sphere among many, all moving to the laws of Kepler, Newton and Einstein. The moon’s orbit around the Earth is slightly tilted, so the shadow of the new m...
How to watch a total or partial solar eclipse
On Monday, August 21st, 2017, sky gazers can witness a total or partial solar eclipse—weather-permitting and depending on their location on the planet—as it traverses North America. There's been a lot of excitement in...
The Big Dipper Through Time
Stars aren’t still--they move through space. Our Sun and the seven stars that form the Big Dipper in the constellation Ursa Major all orbit the center of the Milky Way at different speeds. So why do today’s constellat...
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