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Oscillations

The motion of stars is a

a.       Harmonic motion b.      Periodic motion  c.       Linear motion d.      Circular motion
Can you answer this question?

Hence the motion of stars is relative to earth.
Thus as the earth rotates the stars relatively move with the period of a day, further as the earth moves around the sun, the stars are seen to occupy different position
Hence b is the correct answer.
answered Dec 10, 2013 by