Question

If the distance between two stars in a galaxy is 16.3 light years, what is its value in the unit of parsec?

• A. 5

Answer 1

The correct option is A 5
Given:
The distance between the two stars, $d=16.3ly$
One parsec is equal to 3.26 light years.
So, $1ly=\frac{1}{3.26}\text{parsec}$
$⟹16.3ly=\frac{16.3}{3.26}\text{parsec}$
$=\frac{16.3\times 100}{3.26\times 100}=\frac{1630}{326}=5\text{parsec}$