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Births on March 6

Joseph von Fraunhofer
1787Mar, 6

Joseph von Fraunhofer

Joseph von Fraunhofer, German physicist and astronomer (d. 1826)
Joseph Ritter von Fraunhofer (; German: [ˈfraʊnˌhoːfɐ]; 6 March 1787 – 7 June 1826) was a German physicist and optical lens manufacturer. He made optical glass and achromatic telescope objective lenses, invented the spectroscope, and developed diffraction grating. In 1814, he discovered and studied the dark absorption lines in the spectrum of the sun now known as Fraunhofer lines.The German research organization Fraunhofer Society is named after him and is Europe's biggest Society for the advancement of applied research.

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Events on 1787

  • 13May

    Arthur Phillip

    Captain Arthur Phillip leaves Portsmouth, England, with eleven ships full of convicts (the "First Fleet") to establish a penal colony in Australia.
  • 14May

    Constitutional Convention (United States)

    In Philadelphia, delegates convene a Constitutional Convention to write a new Constitution for the United States; George Washington presides.
  • 20Jun

    Federal Convention

    Oliver Ellsworth moves at the Federal Convention to call the government the 'United States'.
  • 6Aug

    Constitutional Convention (United States)

    Sixty proof sheets of the Constitution of the United States are delivered to the Constitutional Convention in Philadelphia, Pennsylvania.
  • 12Dec

    United States Constitution

    Pennsylvania becomes the second state to ratify the United States Constitution, five days after Delaware became the first.