What is the meaning of the Greek word 'Planetai' that is used for planet?

  • Asteres planetai, ‘wandering stars’, for star-like objects which apparently moved over the sky, was the term employed by Greek astronomers.
  • The term has included a variety of different objects, like the moon, satellites, sun, and asteroids.
  • As per International Astronomical Union (IAU), a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ‘cleared its neighbourhood’ of smaller objects approaching its orbit.

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