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
Dark Is the Sun to escape. Thomas M. Disch found himself unable to finish reading the novel, describing it as "meant for speed readers whose high-speed attention will construct from the asphalt of the prose a world of low resolution and high escapist involvement; not a novel but a daydream in remedial-reading." Dark Is the Sun Dark Is The Sun is a science fiction novel by American writer Philip José Farmer, first published in 1979. It tells the story of the people and creatures left on Earth when the Sun is dead and the universe is heading towards the Big Crunch. By the year