Template:On This Day (nonfiction)/May 19

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  • 1743: Physicist, mathematician, and astronomer Jean-Pierre Christin publishes the design of a mercury thermometer based on the Celsius scale. The Thermometer of Lyon will be built by the craftsman Pierre Casati using this design.

    1743: Physicist, mathematician, and astronomer Jean-Pierre Christin publishes the design of a mercury thermometer based on the Celsius scale. The Thermometer of Lyon will be built by the craftsman Pierre Casati using this design.

  • 1903: Bacteriologist Ruth Ella Moore born. She will research tuberculosis, immunology and dental caries, the response of gut microorganisms to antibiotics, and the blood type of African-Americans.

    1903: Bacteriologist Ruth Ella Moore born. She will research tuberculosis, immunology and dental caries, the response of gut microorganisms to antibiotics, and the blood type of African-Americans.

  • 1918: Physicist, historian, and academic Abraham Pais born. Pais will be an assistant to Niels Bohr, and a colleague of Albert Einstein, and later write books documenting the lives of these two great physicists and the contributions they and others made to modern physics.

    1918: Physicist, historian, and academic Abraham Pais born. Pais will be an assistant to Niels Bohr, and a colleague of Albert Einstein, and later write books documenting the lives of these two great physicists and the contributions they and others made to modern physics.

  • 1961: Venera 1 becomes the first man-made object to fly-by another planet by passing Venus (the probe had lost contact with Earth a month earlier and did not send back any data).

    1961: Venera 1 becomes the first man-made object to fly-by another planet by passing Venus (the probe had lost contact with Earth a month earlier and did not send back any data).

  • 1971: The Soviet Union launches the Mars 2 spacecraft. The spacecraft will reach Mars, but the landing module will crash after failing to deploy its parachute.

    1971: The Soviet Union launches the Mars 2 spacecraft. The spacecraft will reach Mars, but the landing module will crash after failing to deploy its parachute.

  • 2017: Soviet Air Defense office Stanislav Yevgrafovich Petrov dies. Petrov became known as "the man who single-handedly saved the world from nuclear war" for his role in the 1983 Soviet nuclear false alarm incident.

    2017: Soviet Air Defense office Stanislav Yevgrafovich Petrov dies. Petrov became known as "the man who single-handedly saved the world from nuclear war" for his role in the 1983 Soviet nuclear false alarm incident.

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