Why does the appearance of Saturns rings change over time as seen from Earth?

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    They are spinning around Saturn in a direction whose axis of rotation is perpendicular to the planets axis of rotation..
     The rings are slowly evaporating and will eventually vanish.
     They lie in the planets equatorial plane, which is tilted with respect to the ecliptic..
     They grow and shrink in radius as Saturn moves closer to and farther from the Sun over the course of its seasons.
     They brighten periodically due to auroral discharges that sometimes occur in Saturns magnetic field..
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

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They lie in the planets equatorial plane, which is tilted with respect to the ecliptic..
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)



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