"zero gravity." YourDictionary, n.d. Web. 16 August 2019. <https://www.yourdictionary.com/ZERO-GRAVITY>.
zero gravity. (n.d.). Retrieved August 16th, 2019, from https://www.yourdictionary.com/ZERO-GRAVITY
The condition of real or apparent weightlessness occurring when any gravitational forces acting on a body meet with no resistance so the body is allowed to accelerate freely. Bodies in free fall (including trajectories like orbits) experience zero gravity; bodies at rest on the Earth's surface do not, since they are subject to the counterforce of the surface supporting them.