gravity​
重力
Anti-gravity, the idea of neutralizing or repelling gravity
Artificial gravity
Equations for a falling body
Escape velocity
Atmospheric escape
Gauss's law for gravity
Gravitational potential
Weightlessness, also called microgravity
Newton's laws of motion
Standard gravitational parameter
Weightlessness
https://source.unsplash.com/featured/?gravity%E2%80%8B#.png
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