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Alvan Graham Clark (July 10, 1832 – June 9, 1897) was an American astronomer and telescope-maker. Alvan Graham Clark was born in Fall River, Massachusetts...

Alvan Clark (March 8, 1804 – August 19, 1887) was an American astronomer and telescope maker. Born in Ashfield, Massachusetts, Clark started as a portrait...

42°21′19″N 71°06′33″W / 42.35528°N 71.10927°W / 42.35528; -71.10927 Alvan Clark & Sons was an American maker of optics that became famous for crafting...

named for American astronomer and telescope maker Alvan Clark and his son Alvan Graham Clark. Clark has a narrow inner wall, and thus a wide interior...

a large focal plane. The earliest double Gauss lens, patented by Alvan Graham Clark in 1888, consists of two symmetrically-arranged Gauss lenses. Each...

as the basis for the Double-Gauss lens first proposed in 1888 by Alvan Graham Clark, which is a four-element, four-group compound lens that uses a symmetric...

companion. On 31 January 1862, American telescope-maker and astronomer Alvan Graham Clark first observed the faint companion, which is now called Sirius B....

In 1844 Friedrich Bessel deduced that Sirius was a binary. In 1862 Alvan Graham Clark discovered the companion (Sirius B; the visible star is Sirius A)...

computed an orbit for it in 1851. It was not until 31 January 1862 that Alvan Graham Clark observed a previously unseen star close to Sirius, later identified...

positional measurement, and eventually led to the discovery of Sirius B by Alvan Graham Clark in 1862, the first discovery of a white dwarf. John Martin Schaeberle...

Astrographic Catalogue A.C. — Alvan Clark (double stars) Ac / Ack — Agnès Acker (planetary nebulae) A.G.C. — Alvan Graham Clark (double stars) AGC — Arecibo...

discoveries in astronomy have occurred. Bruce turned to telescope maker Alvan Graham Clark to see how she could support research in astronomy. Bruce made over...

Johannes Kepler's supernova, SN 1604, in Serpens is observed. 1862 – Alvan Graham Clark observes Sirius B. 1866 – William Huggins studies the spectrum of...

ironclad warship, USS Monitor, is launched in Brooklyn. January 31 – Alvan Graham Clark makes the first observation of Sirius B, a white dwarf star, through...

technology involved some significant events, listed below. January 31 – Alvan Graham Clark makes the first observation of Sirius B, a white dwarf star, through...

1919) July 6 – Emperor Maximilian I of Mexico (d. 1867) July 10 – Alvan Graham Clark, American astronomer and telescope-maker (d. 1897) July 11 – Charilaos...

Paris, France by Mantois and delivered to Alvan Clark & Sons in Massachusetts where they were completed. Clark then made what would be the largest telescope...

1908) 1830 – Camille Pissarro, Danish-French painter (d. 1903) 1832 – Alvan Graham Clark, American astronomer (d. 1897) 1835 – Henryk Wieniawski, Polish violinist...

warship, USS Monitor, is launched at Greenpoint, Brooklyn. January 31 – Alvan Graham Clark makes the first observation of Sirius B, a white dwarf star, through...

Frémont is court-martialed for mutiny and disobeying orders. 1862 – Alvan Graham Clark discovers the white dwarf star Sirius B, a companion of Sirius, through...