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) Earth Diaries" segments were not shown immediately after each episode, but collectively in "Planet Earth: The Filmmakers' Story", a two-hour special which was broadcast after the series had finished its initial network run. Edited versions were later broadcast on The Science Channel, Animal Planet, and Planet Green. In Canada, the series did not air on the Canadian Discovery Channel, as it is owned by CTV and the Canadian rights were exclusively sold to the CBC. The latter episodes were supplemented by "Planet Earth: The Future", a series of three 60-minute films that highlight the conservation issues surrounding some of the