22 October
1792: On 22 October 1792, Guillaume Le Gentil died.Le Gentil was a French astronomer who attempted to observe the transit of Venus across the Sun by travelling to India in ...
27 FEB. 2004
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1893: On 23 October 1893, Ernest Julius Öpik was born.
Öpik was an Estonian astronomer best known for his studies of meteors and meteorites. His career was devoted to understanding the structure and evolution of the cosmos. When Soviet occupation of Estonia was imminent, he moved first to Hamburg, Germany and then to the Armagh Observatory in Ireland from 1948 until 1981.
He made the first prediction of the existence of a cloud of cometary bodies encircling the Solar System. This was later known as the 'Oort Cloud'.
4004 BC: On 23 October 4004 BC, the world was created, according to Archbishop James Ussher of Armagh (1581-1656).
Ussher was highly regarded in his day as a churchman and a scholar. Based on an intricate correlation of Middle Eastern and Mediterranean histories and Holy writ, he established the first day of creation as Sunday 23 October 4004 BC. Ussher calculated the dates of other biblical events, concluding, for example, that Adam and Eve were driven from Paradise on Monday 10 November 4004 BC, and that the ark touched down on Mount Ararat on 5 May 1491 BC 'on a Wednesday'.
The age of the Universe is now considered less certain, but is placed between 7 and 20 thousand million years old.
Mediemodal
21 October
1967: On 21 October 1967, Ejnar Hertzsprung died.Hertzsprung was a Danish astronomer who classified types of stars by relating their surface temperature (or colour) to their absolute brightness.A few years ...
20 October
1896: On 20 October 1896, Félix Tisserand died.Tisserand was a French astronomer especially noted for his textbook Traité de mécanique céleste ('Treatise on Celestial Mechanics'). This work, an update of ...
19 October
1910: On 19 October 1910, Subrahmanyan Chandrasekhar was born.Chandrasekhar was an Indian-born American astrophysicist who (with William A. Fowler) won the 1983 Nobel Prize for Physics for formulating the currently ...
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