Question

What is light year ? ​

Answer 1

Answer:

The light-year, alternatively spelled lightyear, is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers or 5.88 trillion miles. As defined by the International Astronomical Union, a light-year is the distance that light travels in vacuum in one Julian year.

Answer 2

a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 10¹² km (nearly 6 million million miles).