The moon is a harsh mistress-gravitational impacts on NSLS-II
(PHYSorg.com Physics)

Night and day, as the moon orbits around earth and the earth around the sun, the gravitational forces of these celestial bodies pull on the earth. This pulling force is what causes the earth`s sea levels to rise and fall, a phenomenon we call the `tides.` But did you know that land, too, experiences a tide?