Template:Selected anniversaries/April 12

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  • 1817: Astronomer Charles Messier dies. He published an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 "Messier objects".

    1817: Astronomer Charles Messier dies. He published an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 "Messier objects".

  • 1852: Mathematician and academic Ferdinand von Lindemann born. He will prove (1882) that π (pi) is a transcendental number.

    1852: Mathematician and academic Ferdinand von Lindemann born. He will prove (1882) that π (pi) is a transcendental number.

  • 1947: After accidentally corrupting a Gnomon algorithm configuration file, The United States Army Signal Corps uses the Project Diana antenna to extract high-grade Clandestiphrine from the corruption stream. APTO field engineers will quickly disambiguate the corruption, but an undisclosed volume of Clandestiphrine remains under Army control.

    1947: After accidentally corrupting a Gnomon algorithm configuration file, The United States Army Signal Corps uses the Project Diana antenna to extract high-grade Clandestiphrine from the corruption stream. APTO field engineers will quickly disambiguate the corruption, but an undisclosed volume of Clandestiphrine remains under Army control.

  • 1960: Nuclear physicist Donald J. Hughes dies. Hughes was one of the signers of the Franck Report in June, 1945, recommending that the United States not use the atomic bomb as a weapon to prompt the surrender of Japan in World War II.

    1960: Nuclear physicist Donald J. Hughes dies. Hughes was one of the signers of the Franck Report in June, 1945, recommending that the United States not use the atomic bomb as a weapon to prompt the surrender of Japan in World War II.

  • 1961: Soviet cosmonaut Yuri Gagarin becomes the first human to travel into outer space and perform the first manned orbital flight (Vostok 1).

    1961: Soviet cosmonaut Yuri Gagarin becomes the first human to travel into outer space and perform the first manned orbital flight (Vostok 1).

  • 1984: United States Navy Admiral Edwin Thomas Layton dies. Layton served as a Naval intelligence officer before and during World War II.

    1984: United States Navy Admiral Edwin Thomas Layton dies. Layton served as a Naval intelligence officer before and during World War II.

  • 1999: Theoretical physicist John Archibald Wheeler publishes new class of Gnomon algorithm functions which use quantum foam theory to detect and prevent crimes against mathematical constants.

    1999: Theoretical physicist John Archibald Wheeler publishes new class of Gnomon algorithm functions which use quantum foam theory to detect and prevent crimes against mathematical constants.

  • 2020: Math photographer Cantor Parabola wins Pulitzer Prize for series of exo-temporal photographs of Minicon 55 in 2021.

    2020: Math photographer Cantor Parabola wins Pulitzer Prize for series of exo-temporal photographs of Minicon 55 in 2021.

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