Lightsails
A beam of light carries both energy and momentum. The momentum of light results in a slight pressure on a surface exposed to sunlight that is known as photon pressure. When light reflects o...
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Solar Sail
Scientists are looking for ways to propel spacecraft with less fuel than a rocket uses. The solar sail intrigues many because it requires no fuel at all.
In the late 1860s the theory of ele...
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Lightsails
Solar Sail