13 December
1805: On 13 December 1805, Johann von Lamont was born.Von Lamont was a Scottish-born German astronomer who is noted for discovering that the magnetic field of Earth fluctuates with a ...
31 DETS. 2003
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1615
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1546: On 14 December 1546, Tycho Brahe was born.
Brahe was a Danish astronomer whose work in developing astronomical instruments and in measuring and fixing the positions of stars paved the way for future discoveries.
His observations, the most accurate possible before the invention of the telescope, included a comprehensive study of the Solar System.
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12 December
1871: On 12 December 1871, French astronomer Jules Janssen made spectroscopic observations of an eclipse in India.The observation confirmed his own theory that the corona, normally only visible during a ...
11 December
1972: On 11 December 1972, Apollo 17 astronauts Gene Cernan and Harrison Schmitt landed on the Moon for a three-day exploration.This would be the final Apollo mission to the Moon.
10 December
1999: On 10 December 1999, ESA's XMM-Newton mission was launched.XMM-Newton can detect more X-ray sources than any previous satellite and is helping to solve many cosmic mysteries of the violent ...
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