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
Planet Earth (2006 TV series) January 2002. A feature film version of "Planet Earth" was commissioned alongside the television series, repeating the successful model established with "The Blue Planet" and its companion film, "Deep Blue". "Earth" was released around the world from 2007 to 2009. There was also another accompanying television series, "", which looked at the environmental problems facing some of the species and habitats featured in the main series in more detail. Planet Earth premiered on BBC One on 5 March 2006 in the United Kingdom. On the same day or in the subsequent weeks or months, the series also began airing in