...to reach our eyes? What is it? I am trying to prove a point to my Honors History teacher and I really need to know this answer soon. thank you for all of your help
light travels 300,000 Kilometer per second!!! It takes about 8.5 minutes for the light to get from sun to earth. so what you see happening in sun now was actually happened 8.5 minutes ago. same is true for the whole universe. If you see a star that is 10,000 light year away, that means what you see is what happened 10,000 years ago.