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 ...
27 ΦΕΒ. 2004
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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 1761. He failed to arrive in time due to an outbreak of war. He stayed in India to see the next transit which came eight years later. This time, he was denied a view because of cloudy weather, and so returned to France. There, he found his heirs had assumed he was dead and taken his property.
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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 ...
18 October
2000: On 18 October 2000, new solar panels for the NASA/ESA Hubble Space Telescope (HST) arrived to be tested at the European Space Agency's ESTEC facility in Noordwijk, the Netherlands. ...
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