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JOHANN FRANZ ENCKE - AUTOGRAPH DOCUMENT SIGNED - HFSID 277546

JOHANN FRANZ ENCKE Encke handwrote and signed this autograph document in un-translated Latin. Autograph document signed: "Commilitonibus honoratissinies/J. F Encke Prof." at top of document, 1 page, 6½x3¾. In Latin, un-translated.

Sale Price $637.50

Reg. $750.00

Condition: fine condition
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JOHANN FRANZ ENCKE
Encke handwrote and signed this autograph document in un-translated Latin.
Autograph document signed: "Commilitonibus honoratissinies/J. F Encke Prof." at top of document, 1 page, 6½x3¾. In Latin, un-translated. Encke (1791-1865) learned Latin while studying at the Hamburg and at the University of Göttingen, where he worked under the direction of Carl Friederich Gauss. While working at the observatory of Seeberg near Gotha, he discovered the period of a new comet which bears his name, Comet Encke. He became director of the observatory in 1822. In 1835, Encke was appointed professor of astronomy and director of the observatory at the University of Berlin. In 1851, Encke determined a new method of calculating planetary perturbations by means of rectangular coordinates. He also discovered the distance from the Sun to Earth by using observations of Venus' transits - a figure that closely agrees with accepted figures today - as well as a gap within a ring of Saturn now called the Encke Gap, and he established methods for calculating the orbits of minor planets and double stars. Lightly toned. Discolored from album mounting on right, left and bottom edges. Pinholes in top corners and bottom edge. Otherwise, fine condition.

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