What’s the farthest out into space we’ve seen?

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The farther you look into space, the farther back in time you’ll see. This is because light has a speed and it takes time for that light to travel across the universe. Because of this there is a limit to what we can see. It also means there are regions of space which we will never see because they are so far away, even though the light is travelling towards us, the space itself is expanding faste...  more...