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planet    音标拼音: [pl'ænət]
n. 行星

行星

planet
n 1: (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 [synonym: {planet}, {major planet}]
2: a person who follows or serves another [synonym: {satellite},
{planet}]
3: any celestial body (other than comets or satellites) that
revolves around a star

Planet \Plan"et\, n. [OE. planete, F. plan[`e]te, L. planeta,
fr. Gr. ?, and ? a planet; prop. wandering, fr. ? to wander,
fr. ? a wandering.]
1. (Astron.) A celestial body which revolves about the sun in
an orbit of a moderate degree of eccentricity. It is
distinguished from a comet by the absence of a coma, and
by having a less eccentric orbit. See {Solar system}.
[1913 Webster]

Note: The term planet was first used to distinguish those
stars which have an apparent motion through the
constellations from the fixed stars, which retain their
relative places unchanged. The inferior planets are
Mercury and Venus, which are nearer to the sun than is
the earth; the superior planets are Mars, the
asteroids, Jupiter, Saturn, Uranus, and Neptune, which
are farther from the sun than is the earth. Primary
planets are those which revolve about the sun;
secondary planets, or moons, are those which revolve
around the primary planets as satellites, and at the
same time revolve with them about the sun.
[1913 Webster]

2. A star, as influencing the fate of a men.
[1913 Webster]

There's some ill planet reigns. --Shak.
[1913 Webster]

{Planet gear}. (Mach.) See {Epicyclic train}, under
{Epicyclic}.

{Planet wheel}, a gear wheel which revolves around the wheel
with which it meshes, in an epicyclic train.
[1913 Webster]

21 Moby Thesaurus words for "planet":
Earth, Jupiter, Mars, Mercury, Neptune, Pluto, Saturn, Uranus,
Venus, asteroid, globe, inferior planet, major planet,
minor planet, planetoid, secondary planet, solar system,
superior planet, terrestrial planet, wanderer, world



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  • Planet - Wikipedia
    The word planet comes from the Greek πλανήται (planḗtai) 'wanderers' In antiquity, this word referred to the Sun, Moon, and five points of light visible to the naked eye that moved across the background of the stars—namely, Mercury, Venus, Mars, Jupiter, and Saturn
  • About the Planets - Science@NASA
    Is There Another Planet in the Solar System? It's an intriguing idea that might explain some current mysteries, but direct evidence of another planet has yet to be found
  • Planet | Definition, Solar System, Characteristics, Facts | Britannica
    Planet, broadly, 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 There are eight planets orbiting the Sun in the solar system
  • The Nine Planets of The Solar System | Eight Planets Without Pluto
    The Nine Planets is an encyclopedic overview with facts and information about mythology and current scientific knowledge of the planets, moons, and other objects in our solar system and beyond The smallest and fastest planet, Mercury is the closest planet to the Sun and whips around it every 88 Earth days
  • Solar System Planets: Order of the 8 (or 9) Planets
    Jupiter is the fifth planet from the sun and the largest planet in the solar system The gas giant is more than twice as massive as all the other planets combined, according to NASA
  • What Is a Planet? - timeanddate. com
    There are eight planets In order of distance from the Sun, they are: Mercury, Venus, Mars, Jupiter and Saturn are visible with the naked eye, and have been known throughout human history
  • Planet - National Geographic Society
    Discovered in 1930, it was long considered the ninth planet in our solar system But in 2006, the International Astronomical Union revised its definition of a planet Under the new definition, a planet must be massive enough that gravitational forces have cleared its solar orbit of other objects
  • What is a Planet? - National Geographic Kids
    But what exactly is a planet? It seems like an easy question After all, you’re standing on one right now! But the scientific definition was fairly loose until recently The discovery of other
  • Solar System Exploration - Science@NASA
    Our solar system has eight planets, and five dwarf planets
  • Solar system | Definition, Planets, Diagram, Videos, Facts | Britannica
    There are eight planets in the solar system The four inner terrestrial planets are Mercury, Venus, Earth, and Mars, all of which consist mainly of rock The four outer planets are Jupiter, Saturn, Neptune, and Uranus, giant planets that consist mainly of either gases or ice





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