revolution
the orbit of an object around another object
rotation
spin of an object around its axis
planet
an object that orbits the sun, nearly spherical in shape, and has no other large objects in its orbital path
dwarf planet
nearly spherical object that share their orbits around the Sun with similar sized objects
asteroids
small, rock objects that orbit the Sun between Jupiter and Mars
meteoroid
small, rocky particle that moves through space (size of a fingernail)
meteor
a meteroid that has entered Earth's atmosphere and produces a streak of light
meteorite
a meteor that reaches the surface of Earth
comet
small, icy object that orbits the sun and develops a tail as it nears the Sun
moon
natural satellite that orbits an object other than a star
astronomical unit (AU)
the distance from the Sun to the Earth