Template:Selected anniversaries/October 13

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  • 1687: Astronomer, lens-maker, and academic Geminiano Montanari dies. He made the observation that Algol in the constellation of Perseus varies in brightness.

    1687: Astronomer, lens-maker, and academic Geminiano Montanari dies. He made the observation that Algol in the constellation of Perseus varies in brightness.

  • 1773: The Whirlpool Galaxy is discovered by Charles Messier.

    1773: The Whirlpool Galaxy is discovered by Charles Messier.

  • 1990: Lorenz system develops self-awareness, experiences irrational fear of the number thirteen.

    1990: Lorenz system develops self-awareness, experiences irrational fear of the number thirteen.

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