1. Pole star appears to be stationary in sky while all other stars appears to move from east to west. Why?
2. What is a light year?
3. Name the two natural satellite of moon.
4. What is constellation?
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pole star is located on north pole i.e., point of rotation of earth. thus pole star is stationary.
light year is distance between one galaxy to another.
constellation is group of stars forming any shape.
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