Question

a) Why does the circle of illumination not coincide with the earth's axis?
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Answer 1

Answer:

here is ur answer mate

Explanation:

If the earth was not inclined at an angle of 23.5 degrees from the vertical then the Circle of illumination and and the axis of earth would have coincided. Thus the Inclination of the earth's axis with respect to the vertical line is the reason for circle of illumination not coinciding with the axis of earth.

hope it helps you

Answer 2

That's your answer!!...........

Due to the Earth's axis from the vertical because if Earth axis is not inclined towards the vertical so the circle of coincided appears . and the Earth's vertical is the major reason of not being coincide.