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
Hard Time on Planet Earth people. Most critics detested the series. According to "People" magazine, "About 20,000 RPM—that's how fast I reckon Walt Disney must be spinning in his grave with shows like this on the air … It is just one long, bad commercial." It did, however, garner a small but loyal fanbase throughout its time on the air. The show is sometimes cited in lists of "One-Hit Wonder" TV shows from the '80s and '90s. Hard Time on Planet Earth Hard Time on Planet Earth is an American science fiction series that aired on CBS as a midseason replacement in 1989. Airing for