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
Mission: Earth, Voyage to the Home Planet pictures from the radar capture. He describes his observations while looking at the Earth from space, for example he says, "Maybe more than any other sight from space, lightning gives the decided impression that the Earth is alive, a living organism". He described aurora phenomena as, "shimmering fingers of green light reaching up from the dark ocean, an arc of light around the South Magnetic Pole". June English provides contextual information about Jones' mission. "Mission: Earth, Voyage to the Home Planet" received a positive review from journalist Rebecca O'Connell, who wrote in the "Pittsburgh Post-Gazette", "The authors convey the awe