Question

Explain why the celestial bodies appear to move from east to west across the sky when viewed from the Earth.

Answer 1

When viewed from the earth, celestial bodies appear to move from east to west in the sky because of the rotation of earth. The earth spins on its axis counter clockwise (west to east) completing 24 hours in one rotation. Due to the daily rotation of the earth, we have to keep changing the direction for observing a particular star. This makes the celestial bodies appear to be moving in the sky east to west with respect to the earth.