Alvan Graham Clark
Appearance
Alvan Graham Clark | |
---|---|
Born | |
Died | June 9, 1897 | (aged 64)
Nationality | American |
Known for | Sirius B |
Scientific career | |
Fields | Astronomy |
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 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 still being used at the landmark Dearborn Observatory of Northwestern University in Evanston, Illinois.[1]
See also
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
External links