Alvan Graham Clark, American astronomer (d. 1897)
Alvan Graham Clark (July 10, 1832 – June 9, 1897) was an American astronomer and telescope-maker.
Alvan Graham Clark, American astronomer (d. 1897)
Alvan Graham Clark (July 10, 1832 – June 9, 1897) was an American astronomer and telescope-maker.