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
The Boy from the Sun The Boy from the Sun The Boy from the Sun is a 2006 children's book by Canadian author Duncan Weller. The second edition, a ten year anniversary book was reprinted in 2016 with an additional 4 illustrations under the author's publishing company name Rogue Planet Books. Three children sit unenthusiastically on a sidewalk "between home and school." A black cloud forms above their heads and grows larger. The cloud not only represents pollution emanating from the three smoke stacks but the state of mind of the children. The black cloud grows bigger until the Boy from the Sun performs a