How can we see so far away with telescopes?
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Because there’s nothing in the way.
The thing that stops us seeing really far away on Earth is that there’s stuff in the way. Even when there’s no objects in the way, the atmosphere scatters light enough that you can’t see things well if they’re far away.
But if you’re looking up, the atmosphere isn’t that thick, so there’s nothing preventing you from seeing things thousands of light years away. Light can travel infinitely far if there’s nothing in the way.
With space telescopes it’s even easier because you don’t even have to worry about the atmosphere.
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