Did you also know that like our moon, Mercury doesn't have as much mass as the Earth and therefore has less gravity.Did you know that like our moon, mercury has almost no spin? Did you also know that like our moon, mercury has almost no atmosphere?
It's distance from the sun is irrelevant.Did you know that mercury is 2/5ths the size of earth, but it's gravity is only 38% as that of the earth, while it is only 36 million miles from the sun?
Mercury's SIZE is irrelevant to it's mass. Size is a measure of distance from one side to the other, mass is a measure of density.
An object which is made of foam can be twenty times larger than an object made of lead and still have less mass.
Gravity is a measurement of mass and distance. A very small, very massive object will have higher gravity on the surface than a very large but EQUALLY massive object will have on it's surface.
That's because the DISTANCE from the center of mass to the surface will be greater.
Spin has NOTHING to do with the equation.
... from the Sun - yes.
Did you know that the closer a planet is to the sun, the stronger the gravitational forces are?
From the planet to an object on the planet, NO. The distance to the Sun has NO effect on the gravity between a planet and an object on the surface of that planet.
Again, you are throwing in variables that are irrelevant.If mercury is approx 40% the size of earth, but it has only 38% of earths gravity, while being so very close to the sun, that makes no sense at all, if just mass accounts for gravity, unless one considers spin rate.
All you need to calculate gravity is:
Mass of the object
Distance from the center of mass.
So, get Mercury's MASS and get Mercury's radius, then you can determine the gravity on the surface of Mercury.