This Day In History : November 13

1978 United States

NASA launches HEAO 2

On November 13, 1978, NASA launched the High Energy Astronomy Observatory 2 (HEAO 2), also known as the Einstein Observatory. This mission was designed to observe X-ray sources in the universe, providing valuable data on cosmic phenomena such as black holes, neutron stars, and supernova remnants.

Also on This Day in History November 13

Discover what happened on November 13 with HISTORY's summaries of major events, anniversaries,
famous births and notable deaths.

Births on This Day, November 13
  • 1809 John Adolphus Bernard Dahlgren

    US Navy officer and inventor of the smooth-bore cannon

  • 1878 Max Dehn

    German mathematician (Dehn’s lemma)

  • 1902 Gustav von Koenigswald

    German-Dutch paleontologist, founder of Pithecanthropus erectus

  • 1954 Scott McNealy

    American businessman, CEO of Sun Microsystems

  • 1893 Edward Doisy

    American bio-chemist (Vitamin K1) , Nobel 1943

Deaths on This Day, November 13
  • 2010 Allan Rex Sandage

    American astronomer who discovered the first optical identification of a quasi-stellar radio source (quasar)

  • 1953 Herbert E. Ives

    American physicist and inventor of transmission of mechanical video pictures

  • 1963 Margaret Murray

    English anthropologist and Egyptologist

  • 1903 Camille Pissarro

    French painter

  • 1770 George Grenville

    British Prime Minister (1763-65) who introduced the Stamp Act


Bloody Sunday in London

On November 13, 1887, Bloody Sunday occurred in London when a peaceful demonstration in Trafalgar Square turned violent. The protest, organized by the Social Democratic Federation and Irish National League, sought to address issues such as unemployment and Irish Home Rule. Clashes with police resulted in numerous injuries and arrests, highlighting tensions in British society.

Artificial Snow Produced Over Mount Greylock, Massachusetts

On November 13, 1946, scientists successfully produced artificial snow from a natural cloud over Mount Greylock, Massachusetts. This groundbreaking experiment marked the first time that cloud seeding was used to create snowfall, paving the way for advancements in weather modification technology.

David Levy Discovers His First Comet

On November 13, 1984, amateur astronomer David Levy discovered his first comet, marking the beginning of his illustrious career in comet hunting. This discovery was the first of many, as Levy went on to co-discover 22 comets, significantly contributing to the field of astronomy.

Mariner 9 Enters Martian Orbit

On November 13, 1971, NASA's Mariner 9 became the first spacecraft to orbit another planet when it entered orbit around Mars. This historic achievement allowed Mariner 9 to capture detailed images of the Martian surface and study its atmosphere and climate, paving the way for future missions to explore the Red Planet.
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