Which of the following statements is true regarding a planet's sphere of influence (SOI)? Select all that apply. Question 20 options: For orbital computations, this point represents the boundary for two-body motion about a planet. This concept represents the true physics of motion in an N-body gravity field. Beyond this point, specific mechanical energy of the orbit becomes positive. This point is considered to be the reach of the central celestial body's gravitational influence. At this point, the gravitational parameter of the central celestial body is zero