What's a space elevator? Simply described, it's a thin ribbon, about 3 feet wide and 60 thousand miles long, stretching upwards from the surface of the Earth. The lower end is bolted to a heavy anchor (think of an oil drilling platform), and the top is capped with a counterweight.

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About Seth Shostak

Seth Shostak was a contemporary American astronomer and author. Seth Shostak is an American astronomer and author, and is currently the senior astronomer for the SETI Institute. Read more on Wikipedia →

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