I was a fan of Arthur C. Clarke when I was a kid and, like many, was sad to hear of his death. Today I learned this:
While a radar technician in the Royal Air Force (1941-1946), Clarke had an idea which he wrote up in a 1945 technical paper: “Extra-terrestrial Relays: Can Rocket Stations Give World-wide Radio Coverage?” It was the invention of the geosynchronous communications satellite. He calculated that by putting a satellite at 22,300 miles above the equator, it would orbit the Earth at the same rate that the Earth rotated on its axis, making the satellite appear to always stay directly above a point on the equator. That way ground stations could always point to it, and it could relay signals. The 22,300-mile orbit is now officially known as the “Clarke Orbit”, but it took nearly 20 years for the first operational satellite to be placed there (and 10 before the first orbital rocket flight). Today, that band of space is stuffed with satellites. He mused he “lost a billion dollars in my spare time” by not patenting the idea.
Courtesy of This is True’s always-interesting Honorary Unsubscribe.