a1_04_planetary_orbits_v4

a1_04_planetary_orbits_v4 - An Ancient Mystery of the...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: An Ancient Mystery of the Planets: Retrograde Motion Hipparchus of Nicaea (165-127 BC) Developed a New and Improved Geocentric System: * Introduced epicycles, building on ideas of Apollonius * Located the Earth slightly off-center (eccentric) The main circle is the Deferent , upon which rotates the center of the secondary circle called the Epicycle to which the planet is afFxed. The two rotate at different rates, Fne-tuned to make the apparent motions as seen from the Earth come out right. Additional epicycles are added to further Fne-tune the system. Notice that the Earth is not exactly at the center, but slightly offset at the "eccentric" point. Nicolaus Copernicus 1473-1543 The Copernican Revolution The Copernican Universe 1543 The Copernican System Advantages Explains a planet’s retrograde motion as Earth “passed” the outer planets. Explains the links of the two inner planets to the Sun as they orbit around the Sun. The Main Points of the Copernican Revolution • The center of the Earth is not the center of the World (= universe) but only the center of weights and the lunar orbit. universe) but only the center of weights and the lunar orbit....
View Full Document

This note was uploaded on 05/05/2010 for the course ASTR 001 taught by Professor Robertfesen during the Spring '10 term at Dartmouth.

Page1 / 23

a1_04_planetary_orbits_v4 - An Ancient Mystery of the...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online