CLASS 6th GEOGRAPHY CHAPTER 1 : The Earth in the Solar System

 

CLASS 6th GEOGRAPHY CHAPTER 1 : The Earth in the Solar System:

      ·      Celestial bodies: The sun, the moon and all those objects shining in the sky are called Celestial Bodies.

·         Stars: Celestial bodies having their own heat and light.

·         Constellation: A group of stars that forms a pattern is called constellation.

    For ex: Ursa major or big bear, satprishi (sapta- seven;  rishi-sages

         

  

  Ø Pole star: Also known as North star. It always indicates north direction.

Ø Asteroids: planets and satellites, there are numerous tiny bodies which also move around the sun. 

Ø Meteoroids: the small pieces of rocks which move around the sun.

v Distance in million kilometers

v(1million = 10 lakh km)

Sun > Mercury (58 million km)> Venus (108 million km)> Earth (150 million km) > Mars (228 million km) > Jupiter (778 million km)> Saturn (1427 million km) > Uranus (2869 million km)> Neptune (4496 million km) There is asteroid belt between mars and Jupiter.  

vThe Sun: center of solar system. It is about 150 million km away from the Earth.

vOrbits: the path on which planets move around the Sun.

v Galaxy: is a huge system of billions of stars and clouds of dust and gases.

v Universe: There are millions of such galaxies that make the universe.

vIn ancient India, it was imagined to be a river of light flowing in the sky. Thus, it named Akash Ganga .

Fun Facts:

                      1.     Mercury is the nearest planet to the Sun and, it takes 88 days to complete a revolution.

2.     Venus is also known as Earth’s twin sister.

3.     Earth is the 5^th largest planet of the solar system. It is geoid in shape.

      4.     Moon is about 3, 84,000km away from Earth. It completes its revolution in 27days.

Galaxy of Earth is Milky Way galaxy