Template:Selected anniversaries/June 25: Difference between revisions

Revision as of 08:17, 20 March 2019

1593: Physician and archaeologist Michele Mercati dies. He was one of the first scholars to recognize prehistoric stone tools as human-made rather than natural or mythologically created thunderstones.
1671: Priest and astromomer Giovanni Battista Riccioli dies. He experimented with pendulums and falling bodies, discussed arguments concerning the motion of the Earth, and introduced the current scheme of lunar nomenclature.
1764: Mathematician Maria Gaetana Agnesi uses Gnomon algorithm techniques to detect and prevent crimes against mathematical constants.
1907: Nuclear physicist J. Hans D. Jensen born. He will share half of the 1963 Nobel Prize in Physics with Maria Goeppert-Mayer for their proposal of the nuclear shell model.
1997: An unmanned Progress spacecraft collides with the Russian space station Mir.
2011: Computer scientist, mathematician, and engineer Annie Easley dies. She was a leading member of the team which develops software for the Centaur rocket stage, and one of the first African-Americans to work as a computer scientist at NASA.
2017: New computational analysis of The Eel Time-Surfing reveals previously unknown cache of steganographic data.

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 ||1959: Bobbie Vaile born ... astrophysicist and astronomer.
-||1960: Walter Baade dies, German astronomer and author. He will discover that there are two types of Cepheid variable stars. Using this discovery he recalculated the size of the known universe, doubling the previous calculation made by Hubble in 1929.
+||1960: Walter Baade dies, German astronomer and author. He will discover that there are two types of Cepheid variable stars. Using this discovery he recalculated the size of the known universe, doubling the previous calculation made by Hubble in 1929. Pic.
 ||1960: Two cryptographers working for the United States National Security Agency left for vacation to Mexico, and from there defected to the Soviet Union.