Tidal range Tidal range Tidal range is the height difference between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun and the rotation of Earth. Tidal range is not constant but changes depending on the locations of the Moon and Sun. The most extreme tidal range occurs during spring tides, when the gravitational forces of both the Moon and Sun are aligned (syzygy), reinforcing each other in the same direction (new moon) or in opposite directions (full moon). During neap tides, when the Moon and Sun's gravitational
Union of the Sun and Moon Union of the Sun and Moon The Union of the Sun and Moon () is one of the Seventeen tantras of the esoteric instruction cycle () which are a suite of tantras known variously as: Nyingtik, Upadesha or Menngagde within Dzogchen discourse. "This tantra shows which experience a person undergoes in the intermediate state, the bardo, after passing away. It teaches how to resolve one's master's oral instructions during the bardo of this life, how to stabilize awareness during the bardo of dying, how to attain enlightenment through recognizing awareness during the bardo of dharmata, and, if necessary, how to