PHY2048_11-06-09 - Planets and Satellites: Kepler's Laws...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Stars follow regular paths in the evening sky. They rotate once every 24 hours about an axis that passes through the star polari Planets and Satellites: Kepler' s. Polaris is the only star th s Laws at does not move in the sky. The stars have fixed spatial relationships among them. Humans have classified them in groups known as "constellations" Polaris Celestial sphere Rotation Axis of the Celestial sphere earth N S Star (13-11)
Background image of page 1

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

View Full DocumentRight Arrow Icon
In contrast, planets follow complicated paths in the sky. An example of such motion is given in the figure. Tycho Brahe made very careful measurementsof planetary motions but he died before he had the chance to analyze his data. (13-12) This task was carried out by his assistant Johannes Kepler who summarized the results into three empirical laws known by his name. Later, Newton used his second law of motion with his gravitational law and the newly developed methods of calculus and derived Kepler's laws
Background image of page 2
. The orbits are described by two
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/12/2010 for the course PHY PHY taught by Professor Mueller during the Fall '09 term at University of Florida.

Page1 / 5

PHY2048_11-06-09 - Planets and Satellites: Kepler's Laws...

This preview shows document pages 1 - 4. Sign up to view the full document.

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