People are saying that The Pillars Of Creation have been destroyed, and will take 400-500 Million light years to reach us. Can someone explain how do we know it when the light hasn’t reached us?

Question

People are saying that The Pillars Of Creation have been destroyed, and will take 400-500 Million light years to reach us. Can someone explain how do we know it when the light hasn’t reached us?

In: 1444

Answer 1

Your mate takes a photo of a strange cloud and sends it to you by mail. When you receive it, you look at the picture, you know the post took two days and clouds don’t last that long.