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what is a planet Related: Chapter Notes - Chapter 1: The Earth in the...
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
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what is a planet Related: Chapter Notes - Chapter 1: The Earth in the...
What is a Planet?
Planets are celestial bodies that orbit around a star, such as the Sun, and do not emit light of their own. They are large enough to have become rounded by gravity, but not massive enough to cause nuclear fusion in their cores. In our solar system, there are eight recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Characteristics of a Planet:
  • Orbits a Star: A planet revolves around a star, like our Sun.
  • Round Shape: Planets are spherical in shape, flattened at the poles and bulging at the equator due to their rotation.
  • Cleared its Orbit: A planet has cleared its orbit of other debris and objects.
  • Not a Star: Planets do not undergo nuclear fusion in their cores, unlike stars.
  • Visible Light: Planets reflect light from the star they orbit, making them visible in the night sky.



Importance of Planets:
  • Support Life: Planets like Earth provide a habitable environment for living organisms.
  • Study of Solar System: Planets help us understand the formation and evolution of our solar system.
  • Navigation: Planets have been used for navigation and timekeeping throughout history.
  • Inspiration: Planets inspire curiosity and wonder about the vastness of the universe.



Conclusion:
In conclusion, planets play a crucial role in our understanding of the universe and our place within it. By studying planets in our solar system and beyond, we gain valuable insights into the nature of celestial bodies and the mysteries of space.
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what is a planet Related: Chapter Notes - Chapter 1: The Earth in the Solar System, Class 6, SST
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