Orbital period equation: T = 2(pi)d/v (The orbital period is how long it takes something to orbit around a planet). time = 2 times pi (3.14) times the distance from Sun divided by velocity.
The equation for calculating our weight on each planet: F = Gm1m2/r2 (force = gravity times mass 1 times mass 2 divided by radius squared.
Fg = Force of gravity is the gravitational pull of two objects with mass. It pulls any object with mass to another object.