Question

1 parsec is equal to

• A. $3.1\times {10}^{15}m$
• B. $3.1\times {10}^{-15}m$
• C. $3.1\times {10}^{16}m$
• D. $3.1\times {10}^{-16}m$

Answer 1

The correct option is C

$3.1\times {10}^{16}m$

1. Parsec or parallactic second refers to the distance at which an arc of length equal to one astronomical unit subtends an angle of one second at a point.
2. It is a unit of distance used to express the distances of stars and galaxies.
3. It is used by professional astronomers.
4. 1 Parsec is equal to 3.26 light-years which is equal to $3.1\times {10}^{16}m.$

Hence, the correct option is (C).