What are the gravity laws?

Answer 1

There's really only one gravity law:

F = G M1M2/R2This tells the strength and direction of the gravitational forces between two

objects that have masses M1 and M2 , and are separated by the distance R .

If you have enough geometry and calculus to work with, this one formula gives

you the weight, falling acceleration and falling speed of any object on any planet,

as well as the shapes and periods of orbits, how to put an artificial satellite into

orbit, and the best paths to take when launching a probe to any planet, asteroid,

comet or moon in the solar system.