Terrestrial planet Terrestrial planet A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, i.e. Mercury, Venus, Earth, and Mars. The terms "terrestrial planet" and "telluric planet" are derived from Latin words for Earth ("Terra" and "Tellus"), as these planets are, in terms of structure, "Earth-like". Terrestrial planets have a solid planetary surface, making them substantially different from the larger giant planets, which are composed mostly of some combination of hydrogen, helium, and water existing in various
A Lord from Planet Earth a Temple. After a civilization reaches a certain level of technological development, its Temple allows the supreme ruler of that world inside it and can grant his or her wishes. Besides its other qualities, a Temple reveals the galactic coordinates of all planets with Temples. Therefore, any interstellar civilization can contact all others, excluding Earth. Earth does not have a Temple, and its coordinates are unknown. That is why Earth is often contemptiously called "the planet which doesn't exist." Most believe that the Seeders, by not leaving a Temple on the planet, displayed their contempt for Earth. One religious sect