Question

If the parallax of a star is 0.28 arc second, Find  the distance of the star from earth in 1y

Answer 1

There is a simple relationship between a star's distance and its parallax angle
d = 1/p
$d= \frac{1}{p}= \frac{1}{0.28}=3.57$
so it is 11.785714285714285714285714285714 light years

Answer 2

11.785714285714285714285714285714 light years