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: The Future about environmental issues. The following year, the BBC commissioned "Saving Planet Earth", the second overtly conservation-themed series to be shown on BBC One. The first BBC series to deal comprehensively with conservation was "State of the Planet" in 2000. The following is an alphabetical list of the interviewees featured in the series, with their titles and professions as credited on screen: Planet Earth: The Future Planet Earth: The Future is a 2006 BBC documentary series on the environment and conservation, produced by the BBC Natural History Unit as a companion to the multi-award winning nature documentary "Planet Earth". The programmes