The Future of Renewable Energy.is Coming from Drones
The drones are coming! And they're making renewable energy You know, the trouble with wind power is that it needs to be windy. And if it's not you really only have two solutions go out and find the wind, or create it. So, how does one create wind Well that's why I've cooked up this huge vat of chili. Just kidding. Actually, there's a company called Solar Wind Energy Tower that has a solution. They propose building towers out in the desert that will suck up hot, dry air. Now that hot, dry air.
Goes up the tower until it hits the top, where they add in water vapor, making that air heavy. And then the air rushes down at speeds upwards of fifty milesperhour, until it hits turbines which then will generate electricity. The best place to harvest wind energy tends to be the coastline. And if you're like me, you like to get your shade from a nice beach umbrella, not a noisy 300ft tall windmill. Luckily, Makani Power, an engineering firm run by a California wind surfer has come up with a pretty cool idea. They have a wind harvesting drone attached to a rope, which.
Sounds pretty radical if you ask me. The most effective part of a turbine blade is the tip. So the Makani Airborne Wind Turbine travels in a vertical circle in the same path as the tip of a conventional turbine blade. Wing mounted rotors catch the rushing wind, which is converted into electricity by small generators and sent back to the ground via the tether, which is a conductive cable. So why is this any better than a traditional windmill The same reason it's better to live in an RV than an Egyptian pyramid. It takes a lot less material to make, and it's portable.
Mental note. Really need to work on my analogies. It's possible that these Makani turbines could be flown out over the ocean where winds are particularly strong. Now the electricity they generate could just be sent down to buoys floating in the ocean and collected later to be sent back to land. Now of course this doesn't mean we should just abandon our traditional wind harvesting strategies, we just have to make them smarter. Which is what companies like GE are doing. You see, they're adding sensors to wind turbines to collect oodles of data, and turn it into.
Dynamic action on the turbines themselves, so if the wind conditions change, the turbine can automatically adjust the tilt of the blades and maximize efficiency. Clearly, none of these solutions are perfect, which is why we're going to have to continue to innovate in this space. After all, when it comes to renewable energy, the winds of change are always blowing. And that leads us to a question. What renewable energy source do you think is the most promising Is it solar, wind, hydroelectric, geothermal Let us know in the comments below.
Sound of Nature Piano Cover
Trees are sanctuaries. Whoever knows how to speak to them, whoever knows how to listen to them, can learn the truth. They do not preach learning and precepts, they preach undeterred by particulars, the ancient law of life. I go to nature to be soothed and healed, and to have my senses put in order. There is no such thing as an empty space or an empty time. There is always something to see, something to hear. In fact, try as we may to make a silence, we cannot. In wilderness people can find the silence and the solitude.
ES Subs NASA Planetary Science Studying the Solar Wind on Mars HD
Mars's atmosphere is much less dense than the Earth's, it only has about one percent of the density of the Earth's atmosphere. However, we're pretty sure that Mars had a much thicker atmosphere in the past, because there's such strong evidence for running water on the surface, and to have running water, Mars's atmosphere had to be much thicker. Now MAVEN is going to look at how Mars lost its atmosphere, in particular whether it could have lost its atmosphere to space. My name is Bob Lin, I'm a professor of physics.
And I work at the Space Sciences Laboratory of the University of California at Berkeley. MAVEN is a Mars Scout mission for NASA, and it's an orbital mission to Mars which is designed to study the loss of the atmosphere of Mars. For example if there was a large solar eruption, if the solar wind increased in strength, we could then look at how the atmosphere gets lost in each of these situations. Because Mars is in the solar wind, a lot of the loss comes from these ions and electrons that are escaping,.
And the Particles and Fields package is designed to look at the escape of the charged particles from the atmosphere. We have the Solar Wind Ion Analyzer, which measures the incoming solar wind, then we have the Solar Wind Electron Analyzer, which measures the incoming solar wind electrons. We have the Langmuir Probe and Waves instrument, and that measures solar ultraviolet. It also measures lowenergy electrons that might be escaping from Mars, and furthermore it measures waves that might be accelerating the ions so that they can escape from Mars. We then have the STATIC instrument.
It will give us the composition of what is escaping, whether it's CO2, or hydrogen, or helium and so forth. The Solar Energetic Particle instrument, SEP, measures highenergy particles from the Sun, and those particles will hit the atmosphere and cause a lot of damage. And finally there's a magnetometer, which will measure the magnetic field in the solar wind and the magnetic field of Mars. Mars is the only planet, besides the Earth, where you really have a chance that life might have formed. The conditions for life are water, running water,.
Can Asteroids Be Deflected
GtgtDenton Ebel If it's big enough, an asteroid from the asteroid belt can really do a lot of damage. We know that this does not happen very often. There are lots of ideas about how to deflect an asteroid. One is, you put something massive near it, which then gravitationally tugs it into a different orbit. One other idea is, if it's not tumbling in its orbit around the sun, you can paint, actually, part of the asteroid with something very reflective, and that actually will allow sunlight itself to push the asteroid into a different orbit.
Another idea is simply blow something up into smaller pieces hoping that those smaller pieces, when they hit the atmosphere, will each break up into small pieces as if they were a meteor shower. Deflecting something so that it lands in the ocean might sound like a good idea, but then you get waves. So it depends where in the ocean you're talking about. And so there are lots of ideas and there are lots of caveats to each of those ideas. But I think that as humans, we have the technology to do this kind of thing.
How Are Large Asteroids Tracked
Gtgt Denton Ebel The U.S. Congress has mandated that NASA, through its observatories, in conjunction with the amateur community, identify and find all of the nearEarth objects that are larger in size than 140 meters, which is about a football field if you count the end zones and a little bit of the sidelines. Not because they're going to destroy civilization, but because they could do a lot of damage. Look what happened with Chelyabinsk, and it was only about 20 meters in diameter. From 30 kilometers up it was breaking windowsbig windows.
With a good, modern telescope, in a darksky environment, you can see a lot of things. And if you have a camera and you have software that can see things moving against the fixed stars, you can find asteroids. You can find comets. And so this is something that has ballooned in the last 20 years, and there's been a tremendous rise in the number of objects that we've foundand then, of course, track. And if you go on to the Minor Planets Center website, which is maintained by NASA, that will tell youwhat's out there today, what we've seen lately.
Strange Magnetic Bubbles at the Edge of the Solar System
The two Voyager spacecraft have been traveling away from Earth for more than 33 years and they are finally in the outer edge of the solar system. This boundary is marked by the outer reaches of the sun's magnetic field and solar wind, which form an enormous expanse called the heliosphere. As the solar wind travels out from the sun, it pushes against the galactic medium and abruptly slows down. This is called the termination shock. Outside this is the heliosheath, where the solar wind slows to a stop and the magnetic field is bent back by the ionized interstellar.
Wind. The sun's magnetic field spins opposite directions on the north and south poles, creating a sheet where the two spins meet. This sheet gently ripples as it travels outward and the ripples get bigger as they go. When this sheet reaches the termination shock, it starts to compress, like water waves hitting a wall. The Voyager spacecraft have now found that after the termination shock, these stackedup ripples of magnetic field form bubbles, shown here as a computer simulation. This discovery has prompted a complete revision of what the heliosheath region looks like.
The smooth streamlined look is gone, replaced with a bubbly, frothy outer layer. This new layer also changes our understanding of how extremely fastmoving particles called cosmic rays enter our solar system. When they arrive at the bubble region, they slowly move from bubble to bubble until they can reach smooth magnetic field lines and follow them toward the sun. The nature of the bubble region explains why Voyager II has been seeing variations in the number of energetic particles compared to Voyager I. Because of its path, Voyager II has been passing in and out of the bubble region. When it is in the region Voyager II.
Sees many trapped cosmic rays and electrons. When it is out of the region the spacecraft sees fewer. Even as the Voyagers answer questions about our solar system, they raise others. For example, scientists aren't clear yet how the bubbly heliosheath is linked to the ribbon feature discovered by IBEX and Cassini. This ribbon shows the emission of energetic particles and seems to indicate some interaction with interstellar space. In the meantime, the Voyager spacecraft continue sending back data, and, after three decades, they still have a unique perspective to offer about the universe we live in.
Why Does the Wind Blow
Music playing The word wind can mean many things. It can be peaceful. Violent. Powerful. Exciting. Bitingly cold. Or searingly hot. Wind is everywhere, all the time. But where exactly does it come from I mean, it's only air, which we've talked about a little before. But there are no fans, or turbines, or giant people in the sky blowing the air around, so... where does the wind come from Even when you don't feel the wind, the air is never totally still. If you zoomed way in, you'd see air molecules, bouncing around, colliding with each other and everything around.
Them. All that bumping and bashing creates a force. It's the force of all those bouncing air molecules over a given area of Earth that results in pressure. See, air has mass, and gravity drives that air down towards the ground. That's why there's more air pressure down here, than, say, Mount Everest. The average atmospheric pressure on Earth is one bar. Or 100,000 Pascals. But luckily that pressure isn't pushing straight down. The force goes out in all directions. SO we aren't squished into pancakes. Wind is what happens when air moves from high pressure to low. Anyone who's ever watched.
The weather knows that air pressure isn't the same everywhere. And that's because of temperature. Air near the equator is heated by the energy of the sun, so it becomes less dense and it rises. Near the poles there's not as much heating by the sun, and that cold dense air sinks down toward the Earth. Right along the equator that creates this area with almost no wind, called the doldrums. But wind doesn't come straight from the north or south. The Earth is turning, and because the atmosphere isn't attached to Earth, that causes the wind.
To curl and rotate. That's known as the Coriolis Effect. If you want to experience that, just try to play catch on a merrygoround. Pressure and temperature combine with a rotating Earth, tilted on its axis and covered in sunabsorbing land masses, and the winds of the Earth begin to swirl like a Van Gogh painting. So begins the swirling cycle of heating, cooling, and rotation that drives everything from gentle breezes to destructive hurricanes. Sometimes a little science can just... blow you away. My name is Marie Curie and I give It's Okay To Be Smart a glowing review. So subscribe.
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