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1. Isaac newton never physically invented the sextent. But he was, however, the first man to conceive of the idea... way before John Hadley actually constructed it. 2. Yes that is true, but John Bird and John Campbell and John Hadley and Thomas Godfrey all reinvented the sextant. But, alas it was Isaac who thought of it but never published it..... BUT WHEN did he think of this sextant... That is the question of which we are actually discussing!!!

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Q: In which year did Isaac Newton create the sextant?
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