|Lived:||1820 - 1884|
William Huggins was an English amateur astronomer who built a private observatory in 1856 at Tulse Hill in South London. In 1860, he installed a fine 8-inch refractor with an optics (objective lense) manufactured by Alvan Clark.
He found his special discipline soon: Spectroscopy, where he was the pioneer. He discovered dark-line spectra (Lines of some Fixed Stars, 1863), and in 1864 he examined the spectrum of a planetary nebula, NGC 6543 in Draco, and found that it had a bright line or emission line spectrum, namely the two greenish lines which could not be identified as of any known element at that time, and were then assigned to a new hypothetical element, "Nebulium." He therefore concluded correctly that this nebula was not composed of stars, which have a continuous spectrum, but of glowing gas. On May 18, 1866 he made the first spectroscopic observation of a nova, Nova Coronae 1866, and found emission lines of Hydrogene. In 1868 he took the spectrum of a comet and identified the spectral lines of ethylene in this spectrum.
He married in 1875, and his wife became a most active collaborator in his work. In 1899, they published a fine Atlas of Representatice Spectra; this work was awarded the Actonian Prize of the Royal Institution. Huggins published numerous papers in the Philosophical Transactions and other journals, which were re-published in 1909 as his collected Scientific Papers.
Sir William Huggins passed away on May 12, 1910.
Honors of Sir William Huggins include naming a Moon Crater (41.1S, 1.4W, 65 km diameter, in 1935) and a Mars Crater (49.4S, 204.4W, 90 km, in 1973) after him. Asteroid No. 2635 was named Huggins, discovered February 21, 1982 by E. Bowell at Anderson Mesa and provisionally designated 1982 DS; it also has a longer list of pre-discovery sightings labelled 1935 CB, 1942 FM, 1952 FZ, 1952 HP, 1953 PW, 1953 RS, 1957 WS, 1970 RQ and 1975 AB1.