Alvan Graham Clark
Civic Line · Harvard400

How did Alvan Graham Clark change this place?

Telescope maker of the Cambridgeport firm Alvan Clark & Sons who, while testing a new lens in 1862, made the first sighting of Sirius B, the white-dwarf companion of the sky's brightest star.

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Why each step follows

01
Person · 1832

Alvan Graham Clark

Telescope maker of the Cambridgeport firm Alvan Clark & Sons who, while testing a new lens in 1862, made the first sighting of Sirius B, the white-dwarf companion of the sky's brightest star.

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