Latest Solar panels on spacecraft Stories
By Grose, Thomas K AERONAUTICS Planes that employ solar energy have been around since the 1970s. But Swiss scientist and pilot Bertrand Piccard is developing a sun-powered plane that's truly revolutionary.
Word of the Day
- A coin originally worth six pennies Scots, and later three; held equivalent to an English halfpenny.
- (in plural) Money; cash.
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