Suppose that future observations with a new telescope reveal a planet


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Suppose that future observations with a new telescope reveal a planet about 16 AU from a star whose mass is the same as our Sun's.  How long does it take the planet to orbit the star?

Jun 1st, 2015

By using Kepler's Third Law p^2 = a^3 we plug the numbers in. 

p^2 = 16AU^3 
p^2 = 4096AU 

Then by taking the square root on both sides of the equation you get p=64 years. 

let me know if you have any questions

Jun 1st, 2015

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