# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Astro*Dictionary by Michael Erlewine





1 article for "Horrocks, Jeremiah"

Horrocks, Jeremiah [Astro*Index]

(1619-1641) English astronomer. Born and died near Liverpool.

His name is sometimes spelled Horrox.

He corrected the Rudolphine Tables of Kepler for the transits of Venus across the Sun's disk, and both predicted and observed the transit of Venus on 1639 SEP 24. The first to accept Kepler's orbital ellipses, he extended the work of Kepler to the motion of Moon, showing that the Moon did move about the Earth in an ellipse. He reasoned that some of the remaining irregularities in the Moon's motion might be due to effects of the Sun, Jupiter, and Saturn. Such improvements, however, had to await the work of Newton.

See also:
♦ Kepler, Johannes


Astro*Index Copyright © 1997 Michael Erlewine