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
Terra Alta, West Virginia Terra Alta, West Virginia Terra Alta is a town and former coal town in Preston County, West Virginia, United States. The population was 1,477 at the 2010 census. Terra Alta was originally called Portland, and under the latter name had its start in the 1850s. The present name Terra Alta is derived from Latin meaning "high land". The town is home to the James S. Lakin House and Terra Alta Bank, each listed on the National Register of Historic Places. Terra Alta is located at (39.444343, -79.544002). According to the United States Census Bureau, the town has a total area