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 (film) Planet Earth (film) Planet Earth is a science fiction television movie that was created by Gene Roddenberry, written by Roddenberry and Juanita Bartlett (from a story by Roddenberry). It first aired on April 23, 1974 on the ABC network, and stars John Saxon as Dylan Hunt. It was presented as a pilot for what was hoped to be a new weekly television series. The pilot focused on gender relations from an early 1970s perspective. Dylan Hunt, confronted with a post-apocalyptic matriarchal society, muses, "Women's lib? Or women's lib gone mad..." "Planet Earth" was the second attempt by Roddenberry to create