Tidal forces refer to the gravitational pull that the Moon and the Sun exert on the Earth, causing the ocean waters to rise and fall. They create the phenomenon of tides, where water levels change regularly throughout the day. Full definition
The lines are the first stages of structural failure caused by tidal forces between the moon and its parent planet. (newatlas.com)
The extreme tidal forces of their interaction have determined the shapes and properties of the two galaxies. (sciencedaily.com)
The researchers believe that tidal forces created by the gravitational pull of the giant planet may have interrupted the magnetic field of the star. (ibtimes.com)