The discussion clarifies that angular momentum does not influence the eccentricity of an orbit in Newton-Kepler dynamics, with eccentricity remaining relatively stable unless affected by tidal forces. Angular momentum is conserved and plays a role in the variation of a planet's speed as described by Kepler's second law, which states that a radius vector from the planet to the sun sweeps out equal areas in equal times. Torque, defined as a twisting force resulting from a force acting on a lever arm, can be utilized to develop Keplerian orbits.
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Originally posted by StephenPrivitera
How is eccentricity of an orbit affected by the angular momentum of the orbiting body (mathematically, that is)? How does torque affect angular momentum? How is a torque exerted? What is a torque?