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==External links== |
==External links== |
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*[http://www.vt-2004.org/Background/Infol2/EIS-F7_pf.html Description of the 1882 transit of Venus expeditions] |
*[http://www.vt-2004.org/Background/Infol2/EIS-F7_pf.html Description of the 1882 transit of Venus expeditions]{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }} |
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*[http://www.scienceandsociety.co.uk/results.asp?image=10306141&wwwflag=2&imagepos=7 Mars globe presented by Louis Niesten to the Royal Astronomical Society] |
*[http://www.scienceandsociety.co.uk/results.asp?image=10306141&wwwflag=2&imagepos=7 Mars globe presented by Louis Niesten to the Royal Astronomical Society] |
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Louis Niesten (1844 – 1920) was a Belgian astronomer working at the Brussels Royal Observatory. In 1877 he observed Mars and created a detailed map of its surface features.
He organized an expedition to Santiago de Chile to observe the Venus transit the Sun in 1882. A second Belgian expedition (led by Jean-Charles Houzeau) travelled to San Antonio, Texas to determine the planet's parallax during the same transit. Both parties used a specially designed heliometer for this purpose.
Acrater on Mars was named in his honor.
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