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
Earth: Voices of a Planet Earth: Voices of a Planet Earth: Voices of a Planet is an album released by Paul Winter in 1990. The album was a commissioned for the 20th anniversary of Earth Day, and was premiered in Times Square by the Paul Winter Consort and special guests. The album is a tribute to the Earth, and features at least one instrument or voice from every continent. The album also features animal calls woven into the music. In particular, recordings of elephant basso-rumbles are used. These sounds, created by elephants, are too low for the human ear to detect on its own, and