____ introduced the concept of the eccentrics and epicycle to planetary motion about Earth, created a star catalog, and is generally credited with the development of trigonometry.
a. Kepler
b. Tycho
c. Copernicus
d. Galileo
e. Hipparchus
2007-03-14 05:04:18 · 3 answers · asked by Jason K 1 in Science & Mathematics ➔ Astronomy & Space
e. Hipparchus (or Hipparchos), the greatest astronomer of antiquity. He also is credited with the discovery of precession.
2007-03-14 05:08:58 · answer #1 · answered by Keith P 7 · 0⤊ 0⤋
Hipparchus meets that description more closely than the other choices -- epicycles are an artifact of the geocentric theory of the solar system and wouldn't have been used by Copernicus (who thought the planets traveled in circles around the sun) or Kepler (who held, correctly, that they travel in ellipses). But Hipparchus didn't introduce the concept of eccentrics and epicycles; he built on the work of Apollonius.
See http://scienceworld.wolfram.com/biography/Apollonius.html
2007-03-14 05:11:01 · answer #2 · answered by Isaac Laquedem 1 · 0⤊ 0⤋
Jason get off your lazy butt and do your own homework.
2007-03-14 05:08:19 · answer #3 · answered by Gene 7 · 0⤊ 0⤋