* Gravity is a fundamental force: It's one of the four fundamental forces in the universe, along with electromagnetism, the strong nuclear force, and the weak nuclear force. All objects with mass exert gravitational force on each other.
* Mass is the source of gravity: The more mass an object has, the stronger its gravitational pull. Even tiny particles like atoms possess a tiny amount of mass and therefore a tiny gravitational force.
* Even empty space has a gravitational effect: While empty space might seem devoid of matter, it actually contains energy in the form of quantum fluctuations. This energy contributes to the curvature of spacetime, which is the foundation of gravity.
In other words, everything in the universe, no matter how small or how empty, has a gravitational effect on everything else.
Therefore, there is no known object in the universe that is completely free of gravity.
