Levi ben Gerson (1288-1344)

Details Levi ben Gerson (1288-1344) Levi ben Gerson (1288-1344)

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke3812.&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 3812. Bristol: Institute of Physics Publishing, 2001

Astronomy and Astrophysics

Astronomy

History And Archaeoastronomy, Biographies

Scientific paper

Philosopher, therologian and astronomer, born in Bagnols, Gard, France. Invented Jacob's staff, an instrument to measure the angles between stars. It is a staff with square cross-section, about 1 m long, with perforated cross-pieces which slide along the staff. The end of the staff is held at the eye and the cross-piece slid along until the two ends fit within the two stars being measured. The st...

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