Why is distance in Space measured in lightyears?

Question

Why is distance in Space measured in lightyears?

In: 1

Answer 1

Because space is really large and light (technically causality) is the fastest thing. It lets you say something like 4 light years instead of 25,310,000,000,000 miles (or 37,840,000,000,000 kilometers if you live in one of those fictional countries outside the US).