I just can’t wrap my mind around this. Can we see them anywhere? Why, if the universe was smaller? Or is there like one place in space where the aftermath big bang happened (I know there was no space at the time and big bang kinda went everywhere ofc) and we are pointing our telescopes at it?
Using human logic we should see the youngest galaxies (as their images in the past) far away and just won’t be able to spot the elders.
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Two reasons, the farther something is away the longer it’s taken the light to reach us, so when we see something that’s millions of light years away we’re actually seeing what happened millions of years ago. Because the things we see normally are so close we don’t realize that light is not instantaneous, so a way to visualize it in your mind is to think about when lightning hits, there’s a delay with the sound. The time that it takes the sound wave to reach her ears is analogous to the time it takes light from an object millions of miles away to reach your eyes. Also the universe is expanding so everything is getting farther apart, so while certain things that would have been seeable eventually we will not actually be able to see because they are receding, other things we are able to see a little bit more in the past so to speak because that light has been delayed getting to us because that object is receding from us.
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