Now that we know that Force = Mass & Acceleration and that we have Wind resistance let's talk about Gravity. Gravity or 'g' on earth is roughly 9.81 meter per second (m/s) though it varies from place to place minimal. but 9.81 is for 'regular' or 'rough' estimations. So everything that falls, falls with 9.81 meter per second straight down towards the core of earth where gravity is created by nothing but the rotation of Earth. Rotation creates Gravity. This means the faster an object rotates around it's own axis it creates gravity. But why do bigger planets that rotate slower have higher gravity? Easy! Mass! Though Bigger doesn't mean Heavier! A huge part is Density. So if Earth would be more dense with whatever it's made off, it would weight more. And if we assume that the rotation speed would be still the same - then the Earths gravity would be higher. Because: Force = Mass * Acceleration. Gravity in this case is our force, which is caused by the Mass of Earth times the Acceleration of it around it's own Axis. The heavier a planet is and the faster it rotates, the higher the gravity of said object. This means if a celestial object (planet, moon, asteroid, etc.) would not rotate in the slightest way, it would have no gravity of it's own. Because it would have no acceleration. Although the fun thing is: There is nothing (known) in our universe that not moves. Everything moves in some way, at all times. And if it wouldn't move on it's own then it's moved from something else. Let's assume there is a planet somewhere that has no acceleration. Then it still would move and therefor has an acceleration, because it would be moved from the nearest object with gravity. This means in order to have no gravity and stop the universe from the messy moving, we would have to make EVERYTHING stop moving. As long as something, somewhere, somehow moves - There is always Force and therefor moving other stuff. (Also this means that just by getting fat you don't build up Gravity, because you still would have to rotate to create such field)
... We already know about this, Urian. But we do enjoy that you are helping the thread get into a higher post-count.
