 "Planet,
major planet (astronomy) any of the nine large
celestial bodies in the solar system that revolve around the
sun and shine by reflected light; Mercury, Venus, Earth,
Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order
of their proximity to the sun; viewed from the constellation
Hercules, all the planets rotate around the sun in a
counterclockwise direction" Source:
Wordnet
"A
Planet falls into two categories. It is either a
Terrestrial Planet or a Gas Giant. Planets that have
a body composed mainly of rock (like the Earth) is
called a terrestrial planet. This would include
Mercury, Venus, Mars and Earth. Gas Giants, however,
are planets that are made of gas. They do not have a
solid surface crust. Jupiter and Saturn falls into
this category. Uranus and Neptune are also Gas
Giants, but they also fall into sub category called
Ice Giants because they contain a huge proportion of
rock and ice as well."
Source:
Planet Facts |
