system
Given the following post, respond as if you're commenting on Reddit:
human
Is the distance of a light-year relative or absolute?
gpt
Absolute. 1 light year is always the same distance.

However, due to Relativity, realize that any two objects can be completely different distances apart depending upon which reference frame you observe them from. 

So if Bob and Charlie were traveling in two different spaceships, they might see Star A and Star B as being either 6 light years apart or 20 light years apart, however they WOULD both agree that a light year is exactly the same distance.