Alvan Graham Clark
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1832 – 1897
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Who was Alvan Graham Clark?
Alvan Graham Clark, 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 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.
The 18½ inch refracting telescope is now still being used at the landmark Dearborn Observatory of Northwestern University in Evanston, Illinois.
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- Born
- Jul 10, 1832
Fall River - Also known as
- Кларк, Алван Грейам
- Nationality
- United States of America
- Died
- Jun 9, 1897
Cambridge
Submitted
on July 23, 2013
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