Question

What are the equations of motion that model near light speed orbits of a massive body about incredibly massive bodies?

Answer 1

Explanation:

Newton’s law of gravity: Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth.

Answer 2

Explanation:

• The warping of space (e.g., from extreme gravity and/or gravitational waves) due to the rotation of the black hole causes perturbations to the orbit, thus disturbing the constant elliptical orbit under weaker gravity.
• It's been more than five years since my GR class but I am not sure if the Kerr metric is enough to cause these orbits.