December 7: Difference between revisions

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  • 903: Astronomer Abd al-Rahman al-Sufi born. He will publish his Book of Fixed Stars in 964.

    903: Astronomer Abd al-Rahman al-Sufi born. He will publish his Book of Fixed Stars in 964.

  • 1823: Mathematician Leopold Kronecker born. His work will include number theory, algebra, and logic.

    1823: Mathematician Leopold Kronecker born. His work will include number theory, algebra, and logic.

  • 1963: Instant replay makes its debut during the Army-Navy football game in Philadelphia, Pennsylvania, United States.

    1963: Instant replay makes its debut during the Army-Navy football game in Philadelphia, Pennsylvania, United States.

  • 1979: Astronomer and astrophysicist Cecilia Payne-Gaposchkin dies. Her doctoral thesis established that hydrogen is the overwhelming constituent of stars, and accordingly the most abundant element in the universe.

    1979: Astronomer and astrophysicist Cecilia Payne-Gaposchkin dies. Her doctoral thesis established that hydrogen is the overwhelming constituent of stars, and accordingly the most abundant element in the universe.

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