system
Given the following post, respond as if you're commenting on Reddit:
human
If the light from a galaxy 250 million light years away takes 250 million years to get to Earth, does that mean if one exploded today we would only discover it in 250 million years?
gpt
Yes, you are correct.

If we observe a close star, for example, say one about 250 light years away. The light we are seeing today was produced from that star 250 years ago.  In another 250 years, we will see what that star *really* looks like *today*.

In this way, astronomy is a form of seeing back in time.