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physics.class-ph2014★ 2 cited
The laws of planetary motion, derived from those of a harmonic oscillator (following Arnold)
P. A. Horvathy, P. -M. Zhang
Kepler's laws of planetary motion are deduced from those of a harmonic oscillator following Arnold. Conversely, the circular orbits through the Earth's center suggested by Galilei…
physics.class-ph2003
Celestial mechanics, from high-school to Newton's Principia
P. A. Horvathy
A high-school exercise is used to get an insight into planetary motion.