Imagine that a comet enters the solar system from Oort cloud, what concepts and laws does one need to take into consideration to simulate how it travels?
I'm about to start researching how to write such a simulation. Of course there is the force of gravity between the comet and the planets. Ideas for what other things I need to take into consideration?
If you know any introductory books that deal with the physics of how comets travel through the solar system that would be very welcome as well.