system
Given the following post, respond as if you're commenting on Reddit:
human
If light from distant stars takes so long to reach us, how do we know they haven't already supernova'd? 

If the light arriving here from distant stars can be from billions of years ago, how do we know that- from those star system's perspective -they aren't already dead?
gpt
We don't know. In the case of some of the most distant observable objects (e.g. galaxies 10+ billion light years away), it's very likely that many of their stars have already burnt out/gone nova/etc. A lot can happen in 10 billion years!