Which Is Not Part Of Our Solar System

The correct answer is satellite.

Explanation:

  • The Sun and the celestial bodies which revolve around it form the solar system.
  • It consists of large number of bodies such as planets, comets, asteroids and meteors.
  • The gravitational attraction between the Sun and these objects keeps them revolving around it.

Satellite

  • A satellite is any celestial body that revolves around another celestial body. Thus, the satellite is not a member of the solar system.
  • Natural satellites and artificial satellites are the two types of satellites.
  • For example, the Moon revolves around the Earth in a fixed orbit, so it is a satellite of the Earth. As a result, the Moon is an example of a natural satellite.
  • A celestial body is said to be a satellite of another celestial body if and only if the other celestial body is a planet.
  • For example, because the Moon revolves around the Earth and the Earth is a planet, the Moon is a satellite of the Earth.
  • Although the earth is a satellite of the sun, it is more commonly referred to as a planet of the sun.

Asteroids

  • Apart from the stars, planets and satellites, there are numerous tiny bodies which also move around the sun.
  • These bodies are called asteroids.
  • They are found between the orbits of Mars and Jupiter.
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Meteors

  • The small pieces of rocks which move around the sun are called meteoroids.
  • Sometimes these meteoroids come near the earth and tend to drop upon it.
  • During this process due to friction with the air they get heated up and burn.
  • It causes a flash of light. Sometimes, a meteor without being completely burnt, falls on the earth and creates a hollow.

Comets

  • Comets are also members of our solar system.
  • They revolve around the Sun in highly elliptical orbits.
  • However, their period of revolution round the Sun is usually very long. A Comet appears generally as a bright head with a long tail.
  • The length of the tail grows in size as it approaches the sun.
  • The tail of a comet is always directed away from the sun. Many comets are known to appear periodically.
  • One such comet is Halley’s comet, which appears after nearly every 76 years. It was last seen in 1986.

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