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Alvan Graham Clark

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Alvan Graham Clark

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Alvan Graham Clark
Alvan Clark and his assistant Carl Ludin (right) alongside of the 40-inch lens, 1896.
Alvan Clark and his assistant Carl Ludin (right) alongside of the 40-inch lens, 1896.
Born July 10, 1832(1832-07-10)
Fall River, Massachusetts
Died June 9, 1897 (aged 64)
Nationality American
Fields Astronomy
Known for Sirius B

Alvan 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 founder of Alvan Clark & Sons.

On January 31, 1862, while testing a new 18-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.

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 See also

  • List of astronomical instrument makers

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 References

  • "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


Persondata
NAME Clark, Alvan Graham
ALTERNATIVE NAMES
SHORT DESCRIPTION American astronomer
DATE OF BIRTH July 10, 1832
PLACE OF BIRTH Fall River, Massachusetts
DATE OF DEATH June 9, 1897
PLACE OF DEATH
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