Sagot :
Explanation:
cause earth is a sphere and the sun shines on different parts of the earth
Answer:
Because earth is rotating in its axis.
Explanation:
Based on the rotation of the Earth, time can be measured by observing celestial bodies crossing the meridian every day. Astronomers found that it was more accurate to establish time by observing stars as they crossed a meridian rather than by observing the position of the Sun in the sky.
Hope its help
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