A Great Ball of Stars: NGC 1806 | Hubble
NGC 1806 was discovered in 1836 by the British astronomer John Herschel. He had travelled to South Africa in order to catalog astronomical objects visible best from southern latitudes, and thereby complete work begun by his father William, the man who coined the term “globular cluster”. Using a large telescope John Herschel carefully scanned the night sky and noted objects of interest, of which NGC 1806 was one. In the same year that he documented NGC 1806 he was visited by the naturalist Charles Darwin after the HMS Beagle stopped over in Cape Town. Darwin later referred to John Herschel as “one of our greatest philosophers”.
The Wide Field Channel of Hubble's Advanced Camera for Surveys was used to obtain this picture that was created from images taken through blue (F435W, colored blue), yellow (F555W, colored green) and near-infrared (F814W, colored red) filters. The exposure times were 770 s, 720 s and 688 s, respectively, and the field of view is 3.1 by 1.9 arcminutes. Surely Herschel, who made great contributions to the sciences of both astronomy and photography, would have been immensely impressed by this glittering Hubble picture.
Credit: European Space Agency (ESA)/Hubble & NASA
Release Date: October 25, 2010
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