Did I hear right? Did Pluto moon someone? What would Mickey say about that?
Anyway, here are a some definitions of a planet I found on thw web:
From
Wikipedia:
A planet is generally considered to be a relatively large mass of accreted matter in orbit around a star. A mass that becomes massive enough to undergo nuclear reactions is considered a star, not a planet. Based on historical consensus, the International Astronomical Union (IAU) lists nine planets in our solar system. However, since the term "planet" has no precise scientific definition, many astronomers contest that figure. Some say it should be lowered to eight by removing Pluto from the list, while others claim it should be raised to ten or even higher depending on how planets are categorized.
From
American Heritage Dictionary:
1. A nonluminous celestial body larger than an asteroid or comet, illuminated by light from a star, such as the sun, around which it revolves. In the solar system there are nine known planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
2. One of the seven celestial bodies, Mercury, Venus, the moon, the sun, Mars, Jupiter, and Saturn, visible to the naked eye and thought by ancient astronomers to revolve in the heavens about a fixed Earth and among fixed stars.
3. One of the seven revolving astrological celestial bodies that in conjunction with the stars are believed to influence human affairs and personalities.
From
Encyclopedia Britannica:
planet - (from Greek planetes, "wanderers"), any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions. The term planet has no precise scientific definition.
Shall refrain from making any inappropriate Uranus jokes.
