Defining the term planet is important, because such definitions reflect our understanding of the origins, architecture, and evolu-tion of our solar system. Over historical time, objects categorized as planets …

The “see below” points to a list of primary planets, a definition of minor planet as an asteroid, and a definition of secondary planet as “a planet that orbits another planet, a satellite, a moon.”

The planet definition approved by the International Astronomical Union is based on the observed architecture of the solar system, in which a small number of dominant bodies, the eight planets, have …

This map shows the Earth’s physiographic features, the current movements of its major tectonic plates, and the locations of its volcanoes, earthquakes, and impact craters. The use of color and shaded …

Defining Planets among Planetary Bodies is Semantics, and has to be, to some degree, Arbitrary. A good definition should minimize arbitrariness, but cannot be expected to do away with it entirely. The …

Helium, hydrogen compounds Cloud-top temperature: 60 K Orbit around the Sun: 164.9 Years Moons: at least 13 Gravity: 11.15 m/s2 Weight on Neptune: 1.14 times weight on Earth Escape speed: 23.5 …

Planets: Play dough, clay, small toy balls, or aluminum foil. Sun: A balloon or larger ball. Asteroid Belt and Kuiper Belt: Small rocks, clay, aluminum foil. Saturn's rings: Markers or crayons, heavy paper, …