The law of universal gravitation to find the acceleration of gravity around the celestial body
It may be a bit messy,
Take the planet as a uniform circular motion, gravity acts as a centripetal force, and gravity is equal to gravity. At this time, there will be
F=GmM/(R^2) F=mg
Therefore, the gravitational acceleration of a celestial body with mass m at a certain point in space can be calculated by the following formula
That is GM = g (R ^ 2)
(M is the mass of the celestial body, R is the distance from the object's center of mass to the celestial body. G is the gravitational constant.)