The History of Solar
Paul MacCready builds the first solar-powered aircraft—the Solar Challenger—and flies it from France to England across the English Channel. The aircraft had over 16,000 solar cells
1956 - The first solar cells are available commercially. At $300 for a 1 watt solar cell, the cost is far from the reach of everyday people. 1950's and early 1960's - Satellites in the US's and Soviet's space program were powered by solar cells and in the late 1960's solar power was basically the standard for powering space bound satellites.
1954 - On April 25, 1954, Bell Labs announces the invention of the first practical silicon solar cell. Shortly afterwards, they are shown at the National Academy of Sciences Meeting. These cells have about 6% efficiency. The New York Times forecasts that solar cells will eventually lead to a source of "limitless energy of the sun".
The first and most significant of these was the launch of space satellite Vanguard 1. It was the first successful satellite to use solar power, and it's actually the oldest satellite still orbiting Earth. Although the satellite used a small solar array, the cells produced around 1 Watt with 10% efficiency.
In 1958, solar cells were applied to the Vanguard satellite as an alternative to a battery. In 1959, the US launched Explorer 6 launched with wing-shaped solar arrays consisting of Hoffman solar cells. By 1960, solar cells were the main power source for orbiting satellites and probes.
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