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 Amazing Race 30 answering these questions: (1) What is the distance in miles that Copernicus calculated between the earth and the sun? (3,391,000 miles); (2) What is the name of the second lecturer? (Professor Bergler); (3) Which planet did Copernicus say was the second farthest from the sun? (Jupiter); (4) What is the law which causes objects to disappear as they move away from us? (Law of perspective); (5) Question not shown (blue); (6) Up to how many miles away can a lighthouse be seen? (40 miles); (7) What year did Copernicus publish his astronomical model? (1543); (8) Is the earth round or