Have you heard of Starfish Prime? In the 1960s, the US government shot a nuclear bomb into space where it detonated. It’s assumed that the blast caused many satellite failures in ensuing months.
via The Huffington Post:
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The resulting nuclear explosion in space, reports Discover Magazine, was a pulse of energy so strong it affected electrical circuits, power lines, and streetlights in Hawaii, nearly 600 miles away.
The purpose of this test was, basically, just to see what would happen, notes HowStuffWorks. Specifically, researchers wanted examine how the explosion would affect the Van Allen Radiation Belts — bands of high-energy protons and electrons that follow the Earth’s natural magnetic field — to see if they could be manipulated for national defense purposes.
Scientists learned plenty from the experiment, and bystanders from Hawaii to New Zealand were treated to a view of “rainbow skies,” but according to NPR, this “greatest man-made light show” actually resulted from radioactive particles coming into contact with oxygen and nitrogen in Earth’s atmosphere.