Answer:
Gravity causes objects to move towards one another, in the absence of other forces. Gravity is much weaker than the other forces. In outer space, it is usually the only one of the four that can act over scales larger than the solar system. It is a long-range force and it always causes attraction between objects. The heavier the masses involved, or the closer together they are, the stronger the effect of the gravitational force and the higher the velocities achieved by the infalling particles.
Explanation:
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