Alvan Graham Clark

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. In 1862, while testing a new 18-inch refracting telescope he discovered Sirius B, the magnitude 8 companion of Sirius.

Related Topics:
July 10 - 1832 - June 9 - 1897 - Fall River, Massachusetts - American - Astronomer - Telescope - Alvan Clark - 1862 - Sirius B - Sirius

~ ~ ~ ~ ~ ~ ~ ~ ~ ~