Topic: planet

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planet

The Columbia Encyclopedia, Sixth Edition
planet [Gr.,=wanderer], a large nonluminous ball of rock or gas that orbits a star. The term, once limited to any of the eight solid, nonluminous bodies (major planets) that revolve around the sun, has been extended to include similar bodies discovered revolving around other stars. The term is sometimes used to include the asteroids (or minor planets) but excludes the other members of the solar system : comets and meteoroids (see meteor ; see also planetary science and planetary system , as well as the table entitled Major Planets of the Solar System ). Classification... Read more
Planet X
Space Sciences Planet X Ever since the discovery of the ninth planet, Pluto, astronomers have speculated about whether a still more distant, tenth planet may exist. This thinking was initially based on two lines of reasoning. First ... Read more
superior planet
The Columbia Encyclopedia, Sixth Edition superior planet planet whose orbit lies outside that of the earth. The superior planets are Mars, Jupiter, Saturn, Uranus, and Neptune. Author not available, SUPERIOR PLANET. , The Columbia Encyclopedia, Sixth Edition 2008 Read more

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Nightwish Planet Hell