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
Mr. Martian Mr. Martian Mr. Martian (AKA: CH'kk Kk'xx – Chuck Cox) is a fictional character in Big Bang Comics, who first appeared in "Big Bang" #21, but didn't receive his own story until "World Class Comics" #1. CH'kk Kk'xx is a Martian originally sent to investigate planet Earth and see that the Nuclear Age went without disaster. CH'kks' spaceship crashed outside of Roswell after being shot down by the American Air Force, mistaking it for a Communist attack. CH'kk went underground as Chuck Cox, and soon came to like the Earth, and instead decided to defend it from his own planet.