RusselWilsonJr
Who do you think you are? I am
Nah b. If it's a billion light years away then it takes a billion years for that light to rech us. We're literally looking into the past when we see an event like that. The closest star to us is Proxima Centauri, a little over 4 light years away from us. If it were to go supernova today, we wouldn't see it with our naked eyes for 4 years. That's how it works.
This doesn't sound right, ngl. You got a link? I don't see how we could experience it the same moment. Even if someone turned on a flashlight on the moon, we would notice a delay.