pub fn heliocentric_exit_velocity(
planet_velocity: [f64; 3],
flyby: &FlybyResult,
) -> [f64; 3]Expand description
Heliocentric velocity of the outgoing spacecraft after a flyby.
v_helio_out = v_planet + v_inf_out
where v_inf_out = |v_inf_out| * v_inf_out_dir from the flyby result.