18 November
1923: On 18 November 1923, Alan Shepard, Jr. was born.Shepard was America's first man in space and one of only twelve humans who walked on the Moon. Named as one ...
27 FEB. 2004
Publicatiedatum
891
Weergaven
1918: On 19 November 1918, Hendrik Christoffel van de Hulst was born.
Van de Hulst was a Dutch astronomer who predicted theoretically that 21-centimetre radio waves were produced by interstellar hydrogen atoms.
His calculations later proved valuable in mapping the Milky Way and were the basis for radio astronomy during its early development. Shortly after the Second World War, several groups set about to test the prediction. The 21-centimetre line of atomic hydrogen was detected in 1951, first at Harvard University then followed within a few weeks by others.
The discovery demonstrated that astronomical research, which at that time was limited to conventional light, could be complemented with observations at radio wavelengths, revealing a range of new physical processes.
Mediamodaal
17 November
1995: On 17 November 1995, ESA's ISO mission was launched by an Ariane 44P launcher from Europe's spaceport in Kourou, French Guiana.Probing the cool and hidden Universe, the Infrared Space ...
16 November
1973: On 16 November 1973, Skylab III was launched from Cape Canaveral, USA.It was an 84-day mission that remained the longest American spaceflight for over two decades (until Norm Thagard ...
15 November
1738: On 15 November 1738, Sir William Herschel was born.Herschel was a German-born British astronomer. In 1773, he made and began using his first telescope. With it he began a ...
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