Template:Selected anniversaries/September 23

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  • 1877: Mathematician and astronomer Urbain Le Verrier dies. He predicted the existence and position of Neptune using only mathematics, an event widely regarded as one of the most remarkable moments of 19th century science.

    1877: Mathematician and astronomer Urbain Le Verrier dies. He predicted the existence and position of Neptune using only mathematics, an event widely regarded as one of the most remarkable moments of 19th century science.

  • Omar Khayyam invents new form of Gnomon algorithm.

    Omar Khayyam invents new form of Gnomon algorithm.

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