Inspiration:

The Dance of the Earth and Venus Around the Sun - Reddit

References:

Are all the planets in our solar system moving at the same speed around the sun? - Quora

The Orbital Velocities of the Planets

Orbital resonance and Solar cycles

Questions:

Given an orbital speed, how do I calculate distance traveled on an arc? To expand, if I know that a planet takes a certain amount of time to travel a small curve of the circle, how can I translate that into a change in the polar angle.

Thoughts:

Add moons?