L/3 years =
Δθ
/3 years *
d
= (0.002 arc-seconds/3 yr * 1 radian/206,265 arc-seconds)*(8 x 10
8
pc * 1 ly/0.30659 pc)
= 9.696 x 10
-9
radian/3 yr * 2.61 x 10
-9
ly = 25.3 ly/3 years
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