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.
Rock carvings in Central Norway horse pulling the sun across the sky during the day, and the boat bringing it back through the underworld during night-time. The hunter's rock carvings are often found in places with striking and highly visible natural features, such as below steep cliffs, by waterfalls etc. This was part of what led to the original hunting-magic-interpretation: supposedly the carvings were made in places where animals could easily be hunted. In Central Norway, these sites have a markedly different distribution than the Bronze Age carvings. Sites are found one by one, often in isolated places. The Bronze Age-sites, on the other hand,