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    How many years does it takes to the planets to be aligned ?

    +1  Views: 209 Answers: 1 Posted: 12 years ago
    Tags: acehstronomy

    1 Answer

    ABOUT EVERY 10 YEARS OR SO.


    First of all, it is impossible for all the planets to form a straight line out from the Sun (or viewed superimposed on each other in the sky) because each planetary orbit is tilted slightly.


    To have all of the planets on the same side of the Sun and virtually all within the same quadrant (90°) happens approximately once every 200 years. RARE as far as humans are concerned, but not rare as far as the solar system is concerned.



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