Alvan Graham Clark
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|Alvan Graham Clark|
Alvan Clark and his assistant Carl Lundin (right) alongside of the 40-inch lens, 1896.
July 10, 1832|
Fall River, Massachusetts
|Died||June 9, 1897(aged 64)|
|Known for||Sirius B|
On January 31, 1862, while testing a new 18½ inch refracting telescope, he made the first observation of Sirius B in Cambridgeport, Massachusetts. The magnitude 8 companion of Sirius is also the first known white dwarf star.
See also 
- "Alvan Clark, Astronomy, Biographies". AllRefer.com.
- The Dearborn Telescope
- Sirius A & B: A Double Star System In The Constellation Canis Major
- Northwestern University Astronomy and Astrophysics - History of Dearborn Observatory
- Look south to see winter's brightest constellations
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