When that star exploded, the earth did no exist. The solar system did not exist. The parent star that exploded that eventually gave us the debris that became our sun probably didn’t exist as probably it’s parent star didn’t yet exist, either. 13 billion years it took the gamma ray burst, traveling at the speed of light (which is very slow for such a big universe) to reach the spot where one day a planet full of life would observe it............
Yea but doesn’t that mean that the universe expanded far faster than the speed of light?