It is gravity.
Gravity is the force of attraction that exists between all objects in the universe.
Gravitation is the universal force of attraction between all matter in the universe.
It is gravity.
It is the force of attraction between all masses in the universe.
The force of attraction between all masses in the universe.
Gravity is the force of attraction that exists between all objects in the universe.
Gravitation is the universal force of attraction between all matter in the universe.
It is gravity.
Gravity.
Every mass in the universe does that.
The force of attraction between all masses in the universe.
It is the force of attraction between all masses in the universe.
Mutual force of gravitational attraction.
Gravity is the force of attraction whcih exists between all matter in the universe. Its strength is inversely proportional to the square of the distance between the two particles of matter.
gravity
I think it is Gravity
Gravity, the force of attraction between all masses in the universe, is the inward force that holds a star together.