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Alvan Graham ClarkAlvan Graham Clark (July 10, 1832 – June 9, 1897), born in Fall River, Massachusetts, was an American astronomer and telescope-maker. He was the son of Alvan Clark. In 1862, while testing a new 18-inch refracting telescope he discovered Sirius B, the magnitude 8 companion of Sirius. ReferenceThe contents of this article are licensed from Wikipedia.org under the GNU Free Documentation License.
How to see transparent copy 01-04-2007 01:21:04 |
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