Final answer:
Newton's law of gravitation describes the gravitational interaction between celestial bodies and helps explain the motion of objects in outer space.
Step-by-step explanation:
Newton's law of gravitation describes the gravitational interaction between celestial bodies, such as planets, stars, and galaxies. It provides a mathematical basis for understanding the force of gravity and how it changes with mass and distance. The law helps explain the motion of objects in outer space, including the paths of planets around the Sun in the solar system.