Kepler’s Laws

Kepler's laws don't prove heliocentricity, they prove that the sun is at one focus of elliptical planetary orbits. The Earth is the other focus. Kepler couldn't find the second focus because he was standing on it.

October 13th

Elliptical planetary orbits with two foci, the earth and the sun

Kepler's Laws are the weakest point of the theoretical foundation of popular science (SciPop). The weakness is that Kepler's laws are derived empirically, but they're applied theoretically.

April 12th

Despite the self-evident truth of empirical observations, science promotes a rationalization for them that has no physical cause. It is not a testable hypothesis. Science is unscientific.

April 11th

Myth buster: The Earth-sun orbit isn’t elliptical. The Earth-sun radius is, for all practical purposes, constant. Any apparent eccentricity is variation in the Sun’s orbital radius, not the Earth-sun radius.

April 9th

The Geocentrospheric cosmological model in Matty's Paradigm is a) empirical (directly observable) and b) meets the requirements of Kepler's laws. The heliocentric theory is neither a) nor b).

Effect and Cause

Why are planetary orbits elliptical? We've considered this as an example of how to understand frame of reference, but Newton supposedly solved this problem mathematically in Principia Mathematica: