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 …

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 …

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 …

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 …

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 …

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, …