Template:Selected anniversaries/August 10: Difference between revisions

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||1961: First use in Vietnam War of the Agent Orange by the U.S. Army.
||1961: First use in Vietnam War of the Agent Orange by the U.S. Army.
||1972: The Great Daylight Fireball (or US19720810) was an Earth-grazing fireball that passed within 57 kilometres (35 mi; 187,000 ft) of Earth's surface at 20:29 UTC on August 10, 1972. It entered Earth's atmosphere at a speed of 15 kilometres per second (9.3 mi/s) in daylight over Utah, United States (14:30 local time) and passed northwards leaving the atmosphere over Alberta, Canada. It was seen by many people and recorded on film and by space-borne sensors. An eyewitness to the event, located in Missoula, Montana, saw the object pass directly overhead and heard a double sonic boom. The smoke trail lingered in the atmosphere for several minutes. Pic.


||1976: Josef Mattauch dies ... physicist known for his work in the investigation of the isotopic abundances by mass spectrometry. He developed the Mattauch isobar rule in 1934. Pic.
||1976: Josef Mattauch dies ... physicist known for his work in the investigation of the isotopic abundances by mass spectrometry. He developed the Mattauch isobar rule in 1934. Pic.

Revision as of 14:36, 7 October 2020