An experimental NASA solar sail can be seen in the night sky as it orbits the Earth ... but instead of being pushed by wind, they are impacted by the pressure of sunlight as photons bounce ...
But as a species we wouldn’t have made it very far if it was only possible to sail in the same direction the wind is blowing. There are a number of methods for sailing upwind, but generally only ...
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Nasa’s giant solar sail appears to tumble through night skysimilar to the way a sail boat is propelled by wind. Future versions of the solar sail could be 25 times bigger than the current craft, capable of powering trips to other planets in the Solar System.
Weather delays are frustrating for sailors, but having adequate wind is fundamental for the sport of sailing. Every sailor has experienced postponements for either no wind, or sometimes too much wind.
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