Gravity is a rigidity pulling mutually all matter (that is a few thing you are able to bodily contact). The extra matter, the further gravity, so issues which have a lot of matter mutually with planets and moons and stars pull extra strongly. Mass is how we degree the quantity of matter in some thing. The extra large some thing is, the further of a gravitational pull it exerts. As we walk on the exterior of the Earth, it pulls on us, and we pull decrease back. yet because the Earth is a lot extra large than we are, the pull from us isn't solid sufficient to bypass the Earth, at the same time as the pull from the Earth can make us fall flat on our faces. as well to reckoning on the quantity of mass, gravity also relies upon on how some distance you're from some thing. that is why we are stuck to the exterior of the Earth instead of being pulled off into the daylight, which has many extra situations the gravity of the Earth.