Año luz (al)

A light-year is a unit of distance used in astronomy, equivalent to about 9.5 trillion kilometers. It simplifies expressing vast astronomical distances. The nearest star is around 4 light-years away, and the closest galaxy is approximately 25,000 light-years distant.

What is the approximate distance in kilometers that 1 light-year represents?

Why is the light-year considered a useful unit for expressing astronomical distances?

What challenges might arise when expressing astronomical distances in kilometers?

What is the distance to the nearest star in light-years?

How far away is the nearest galaxy in light-years?