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
Stowaway to the Mushroom Planet Stowaway to the Mushroom Planet " Stowaway to the Mushroom Planet "is the second in the series of "Mushroom Planet" books by Eleanor Cameron, and was published in 1956, two years after "The Wonderful Flight to the Mushroom Planet". This children's book is set in a beach community in California, as well as on a tiny, habitable moon, "Basidium", in an invisible orbit 50,000 miles from Earth. The "Mushroom Planet," visited by the protagonists David and Chuck, is covered in various types of mushrooms and is populated by little green people. The story opens with Theo Bass, the cousin of