Literally, the `Sun standing still'. The The time when the Sun is at its greatest Northern or Southern Declination, on the Tropics. The Sun is then farthest from the Equator and seems to "stand still". The opposite point in the year to the Equinoxes. It then appears to turn in the opposite direction. This impression of created by the earth's tilt of 23 degrees 27 minutes and the Tropics lie at earth Latitudes of 23 degrees 27 minutes north or south of the Equator. These latitude circles are called the Tropic of Cancer (north) and the Tropic of Capricorn (south). The band of geographic latitudes lying between these boundaries is called the Torrid Zone. Within the Torrid Zone, the Sun will pass through the observer's Zenith sometime during the year.