Edmond Halley

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Noun1.Edmond Halley - English astronomer who used Newton's laws of motion to predict the period of a comet (1656-1742)Edmond Halley - English astronomer who used Newton's laws of motion to predict the period of a comet (1656-1742)
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Sir Edmond Halley predicted the reappearance of Halley's Comet once in every 75/76 years in 1705, although its presence had been recorded by the Chinese and even Indians much before that - without knowing it was the same comet doing its long periodic rounds.
The fact that both Sir Isc Newton and Sir Edmond Halley could derive a set of physical laws with extreme accuracy that stood the test of time, just by using some impoverished equipment and limited knowledge, shows that the modern technology is not a match yet for the visions of geniuses of Newton' calibre, despite its complementary role in space exploration in our time - and at a huge cost.
From Sir Edmond Halley's 17th century theory of a hollow earth to account for magnetic pole flux to Hitler's search for an opening in the planet to use as a possible hideout, chapters chart speculations and manias from ancient civilizations to modern times, providing a lively survey not just of evolving beliefs, but of how they fostered changes.