So I understand that light travels at a constant speed and that as we look at other galaxies we see them as they were when the light left that galaxy. My question is more to the thought that as the universe expands from the big bang and galaxies are formed, wouldn’t the process of creating everything we know take longer than it takes the light to travel from there to here. So wouldn’t the limit of visible light only be as old as the time it takes to travel? How can we see “The first light after the big bang” as so many scientific groups are trying to do? I’m not sure if I explained my question well. Please give me some leeway.
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For hundreds of thousands of years the universe was too dense for light to travel. There wasn’t space between particles, much less atoms. The cosmic microwave background is light from when the universe first became transparent.
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