What limitation do astronomers face when observing the current structure of the Cat's Eye Nebula?

Answer

The light we see left the nebula 3,000 years ago

Because the nebula is located approximately 3,000 light-years from Earth, there is a significant temporal delay in observing it. Humans are essentially viewing the nebula as it appeared 3,000 years in the past. Consequently, it is impossible to observe real-time structural changes; scientists must rely on astrophysical models and high-resolution imaging to piece together the narrative of its ongoing evolution.

What limitation do astronomers face when observing the current structure of the Cat's Eye Nebula?
evolutionastronomystarnebulacat's eye