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d = sqrt((6.67430e-11 m^3/kg s^2)*(5.972e24 kg)/((6371+200)*10^3 m))*6.5 s
d = sqrt((6.67430e-11 m^3/kg s^2)*(5.972e24 kg)/((6371+200)*10^3 m))*6.5 s
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