\"Luyten 726-8\" Willem Luyten Hand Written Letter on Letterhead For Sale

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\"Luyten 726-8\" Willem Luyten Hand Written Letter on Letterhead:
$279.99

Up for sale "Luyten 726-8" Willem Luyten Hand Written Letter on Letterhead Dated 1972. 

ES-6448E

Willem

Jacob Luyten (March 7, 1899 –

November 21, 1994) was a Dutch-American astronomer. Jacob Luyten was born in Semarang, Java, at the time part of the Dutch East Indies. His mother was Cornelia M. Francken and his

father Jacob Luyten, a teacher of French. At the age of 11 he observed Halley's Comet, which started his fascination with astronomy.

He also had a knack for languages, and eventually could speak nine. In 1912 his

family moved back to the Netherlands where he studied astronomy at the University of Amsterdam,

receiving his BA in 1918. He was the first student to earn his PhD (at the age

of 22) with Ejnar Hertzsprung at Leiden University. In 1921 he left for the United States where

he first worked at the Lick Observatory. From 1923 to 1930 Luyten worked at the Harvard College

Observatory eventually working at the observatory's

Bloemfontein station. He spent the years 1928–1930 in Bloemfontein, South Africa, where he met Willemina H. Miedema

and married her on February 5, 1930. Upon his return to the United States in

1931, he taught at the University of Minnesota from

1931–1967, then served as astronomer emeritus from 1967 until his death. Luyten

studied the proper motions of

stars and discovered many white dwarfs. He also discovered some of the Sun's nearest

neighbors, including Luyten's Star as well as the high–proper motion star

system Luyten 726-8, which was

soon found to contain the remarkable flare star UV Ceti. He also catalogued 17,000

high-proper motion stars in the Luyten Two-Tenths Arcsecond Catalog. An

exoplanet was discovered orbiting one of them, LTT 1445A.

"Luyten 726-8" Willem Luyten Hand Written Letter on Letterhead

$279.99