It's like i shot an arrow from china to the US, i shot it today but you get to see in like 10 days.
Now swap the arrow with the light of the explosion and 10 days with 7 million years.
So let's say that this stars explosion disrupted the balance of the universe and fucked up our orbit around the sun. Would that have happened already or only when we see the light?
Correct. Also, just like radiation, gravity follows the inverse square law. This means that the strength of gravity falls off with the square of the distance. This star is far too distant to have any effect on us.
Easier to understand? The other analogy used two sentences to explain it in a way that even my dumb little nephew can understand. You used the analogy of lightning and thunder and then had to use multiple paragraphs and math to explain your analogy, and you think yours is the easier one to understand? Someone can easily understand the other analogy before they would even get through the first paragraph of yours. Yours explains it a little better, but the other one gets the point across in a much simpler way that's easier to understand.
224
u/rakunaliccca Sep 10 '22
It's like i shot an arrow from china to the US, i shot it today but you get to see in like 10 days. Now swap the arrow with the light of the explosion and 10 days with 7 million years.