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File:NGC 1806 HST.jpg

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原始檔案(3,741 × 2,303 像素,檔案大小:6.97 MB,MIME 類型:image/jpeg


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English: The NASA/ESA Hubble Space Telescope has turned its sharp eye towards a tight collection of stars, first seen 174 years ago. The result is a sparkling image of NGC 1806, tens of thousands of stars gravitationally bound into a rich cluster. Commonly called globular clusters, most of these objects are very old, having formed in the distant past when the Universe was only a fraction of its current age. NGC 1806 lies within the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. It can be observed within the constellation of Dorado (the dolphin-fish), an area of the sky best seen from the Earth’s southern hemisphere.

NGC 1806 was discovered in 1836 by the British astronomer John Herschel. He had travelled to South Africa in order to catalogue 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, coloured blue), yellow (F555W, coloured green) and near-infrared (F814W, coloured 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
日期
來源 http://www.spacetelescope.org/images/potw1027a/
作者 ESA/Hubble & NASA
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Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org.
For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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目前2010年10月25日 (一) 10:58於 2010年10月25日 (一) 10:58 版本的縮圖3,741 × 2,303(6.97 MB)Jmencisom{{Information |Description={{en|1=The NASA/ESA Hubble Space Telescope has turned its sharp eye towards a tight collection of stars, first seen 174 years ago. The result is a sparkling image of NGC 1806, tens of thousands of stars gravitationally bound int

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