Geocentric Coordinate Time system. When the Earth is at perihelion in January, TCG ticks even more slowly than it does on average, due to gravitational time dilation from being deeper in the Sun's gravity well and also velocity time dilation from moving faster relative to the Sun. At aphelion in July the opposite holds, with TCG ticking faster than it does on average. Geocentric Coordinate Time Geocentric Coordinate Time (TCG - Temps-coordonnée géocentrique) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to precession, nutation, the Moon, and artificial satellites of the Earth.
Central City, Nebraska school. In the 1950s, Nebraska Central College closed (1953) but a new hospital was built in 1959. In 1975, an explosion and fire destroyed an entire city block, but Central City still reached its largest population to date at 3,083 people in 1980. Central City's population has declined slightly since then. Six places in or near Central City are listed in the National Register of Historic Places. To qualify for listing in the National Register of Historic Places, a place (e.g., building, landmark, or location) must be at least 50 years old and have one or more of the following