PLANETARY MOTIONS. KEPLERS LAWS (1) The path of every planet in its motion about the sun forms an ellipse, with the sun at one focus. (2) The speed of.
Kepler’s Laws of Planetary Motion. Debate on Planet Motions Geocentric or Heliocentric Universe.
Astronomical History n Ptolemy expresses geocentric model 127AD n Copernicus offers heliocentric model 1530 AD n Tycho Brahe 1546-1601 takes precision.
PLANETARY ORBITS Chapter 2. CONIC SECTIONS PLANETARY GEOMETRY l Definition of a Circle äA Circle is a figure for which all points on it are the same.
