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Sun's Starring Role


Earth Explorer
02-01-1995
Sun's Starring Role

Here's a challenge for you: Think of something that runs on solar energy.
Piece of cake, you might say, and you start naming items that use the sun as their energy source. There's the calculator on your desktop, and the small electric fan you saw in a specialty store. There's the house down the street that heats water with solar energy, those experimental cars they race every three years in Australia...and what about earth-orbiting satellites?
You'd be correct in each case. All those objects are powered by sunlight. For work involving movement or for electronic transmissions, devices called solar cells or photovoltaic cells convert ...

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