Definition: Heavenly bodies with their own motion among the stars, revolving, in the case of the solar system, around the sun, along the plane of the ecliptic. They are grouped into inner planets and outer planets, based on distance from the sun and common characteristics.
no qualif; does not include comets or meteors: METEOROIDS is available; natural satellites: index under SOLAR SYSTEM
See AlsoExtraterrestrial Environment; Minor Planets
