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Homework Help: Finding orbital period

  1. Nov 15, 2015 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations
    (In picture)

    3. The attempt at a solution
    (In picture) image.jpg
  2. jcsd
  3. Nov 15, 2015 #2


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    The distance of each star from the c.o.m. of the system is not L/2. Each star in the group is located L/2 from the two stars immediately adjacent.
  4. Nov 15, 2015 #3

    Mister T

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    You start with the formula ##T^2=\Big( \frac{4 \pi^2}{GM} \Big)r^3## where ##M## is the mass of the attracting body.

    But in your solution you use ##M## for the mass of each orbiting sun.
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