MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY
Newton's law of gravitation and the Earth-Moon system. Diagram showing Earth-Moon system and the application of Newton's law of universal gravitation. The equation (lower left) states that the force (F) between two objects (here the Earth and the Moon) is proportional to the product of their masses (m1 and m2) divided by the square of the distance between them (r, white dotted line). G represents the universal gravitational constant. This equation is used by scientists and engineers to calculate the energy needed to launch spacecraft from the Earth to destinations such as the Moon.
Model release not required. Property release not required.