Earth tide lunar and the solar tidal maxima and minima (bulges and depressions) add together for the greatest tidal range at particular latitudes. At first- and third-quarter phases of the moon, lunar and solar tides are perpendicular, and the tidal range is at a minimum. The semi-diurnal tides go through one full cycle (a high and low tide) about once every 12 hours and one full cycle of maximum height (a spring and neap tide) about once every 14 days. The development of a systematic theory of Earth tides was started by George H. Darwin in 1879, and was then furthered by
Full Moon (Brandy song) and Italy, where it enjoyed equal commercial success as previous single "What About Us?". The song's music video, directed by Chris Robinson, features Norwood telescoping at night. As the video progresses, she attends a house party where she meets a man with whom she is eventually riding off through Los Angeles, watching the rising full moon. Norwood was nearly six months pregnant at the time of the shot. "Full Moon" was included on the set-lists of the Human World Tour (2009), the Slayana World Tour (2016) and performed live by Norwood during several televised events, including Dick Clark's "American Bandstand