A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a unit of astronomical distance.

There are approximately 9.461 trillion kilometers in one light-year.

This conversion helps to make extremely large astronomical distances more understandable by using a unit that better reflects the vastness of space.

While 1,000,000 kilometers is a vast distance on Earth, it is incredibly small compared to the distances between stars, which are measured in light-years.