Question

Interstellar distance is often measured in

• A. light year
• B. astronomical unit
• C. kilometre
• D. metre

Answer 1

The correct option is B

astronomical unit

The distance between the planets in the solar system is known as interstellar distance. Interstellar distance is often measured in astronomical units (AU). The astronomical units (AU) is defined as the average distance between Sun and Earth, which is equal to $1.5\times {10}^8$ kilometres.