Discussion
Read the following statements carefully and select the correct option.
Assertion (A) : The stars in the night sky appear to move from east to west.
Reason (R) : The earth rotates from west to east.
Answer: A
(A) and (R) are both correct and (R) is the correct explanation for (A).
The Earth spins on its axis from west to east. To an observer on the rotating Earth, the sky therefore appears to turn the opposite way, so the stars, like the Sun and Moon, appear to rise in the east and move across the sky towards the west.
The apparent motion is a direct consequence of the Earth's rotation, so R is the reason for A. The stars' own motions are far too small to see in one night.
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