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The Universe

 A galaxy is a huge group of stars held together by the gravitational force.

1. Types:

(i) Spiral galaxy

(ii) Elliptical galaxy

(iii) Irregular galaxies

2. Milky Way:

(i) The galaxy of which our solar system is a part.

(ii) Its diameter is about one lakh light years and the central thickness is about 6000 ly.

(iii) Milky way is spiral in shape.

  • The Stars
    • All star…

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