Explanation
A light-year measures the distance light travels in one year, approximately 9.46 trillion kilometers. Despite the word "year," it is a unit of distance, not time or speed, used in astronomy to express vast interstellar distances.
Practice this MCQ: Light year is a unit of?. Check correct answer and detailed explanation on MrProfessor.
A light-year measures the distance light travels in one year, approximately 9.46 trillion kilometers. Despite the word "year," it is a unit of distance, not time or speed, used in astronomy to express vast interstellar distances.