Solar System

Subject: General Knowledge and IQ

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This note is about information of Solar System, Sun, asteroids, stars, etc.
Solar System


The Solar System is the Sun and all the objects in orbit around it. The Sun is orbited by planets, asteroids,comets and other things.The Sun is a star. It contains 99.9 percent of the Solar System's mass. This means that it has strong gravity. The other objects are pulled into orbit around the Sun. The velocity of the solar system is about 5000 km/sec. The sun is the largest and main star in solar system.The size of the solar system is 79.5 Au. There are 8 planets in the solar system. They are- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. There are 67 satellites in our solar system. In, 1543 A.D it was discovered that the earth and other planets revolve around the sun. Nicolas Copernicus discovered the fact that the sun is in the centre of solar system but not the earth. He belongs from Poland. Sun is the centre of solar system.

Heavenly bodies which revolve around in its elliptical paths are called orbit. In solar system, the asteroids belt lie between the orbits of Mars and Jupiter. Solar system takes One cosmic year to revolve around galactic centre.

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Things to remember
  • There are 8 planets in Solar system .They are (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune)
  • solar system take one cosmic year to revolve around galactic centre
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.
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