Philosophy 167: Class 3 - Part 10 - Astronomia Nova, Part 4: the Area Rule, the Oval, and the Ellipse.
Smith, George E. (George Edwin), 1938-
2014-09-16
Description
Synopsis: Describes Kepler's new rule that the orbital velocity is inversely proportional to the distance from the Sun.
Opening line: "Okay, here's where we've gotten to. We've gotten to where the Earth-Sun orbit has got bisected eccentricity, and therefore, Kepler can go ahead and say velocity in the Mars orbit is inversely proportional to the distance of Mars from the Sun."