I'm going to try to expand a little on my comment regarding inflation. Let me know if it is in any way useful.
Just after the Big Bang, the universe was quite small. Tiny. Smaller than the head of a pin. Then the universe reached the grand old age of $1 \times 10^{-36}$ seconds old, and it had a little bit of a growth spurt. Between $1 \times 10^{-36}$ seconds and $1 \times 10 ^{-33}$ seconds, it expanded at an incredible rate, reaching a size closer to its present-day size.
Before inflation, the universe was - well, we don't really know. Prior to $1 \times 10^{-43}$ seconds, all four fundamental forces were unified. But after inflation, they slowly (relative to the time scales we're talking about) became the distinct forces we know today.
Another curious thing happened after the inflationary epoch: baryogenesis. Prior to this, the universe had been made out of an exotic quark-gluon plasma. Now, some of the matter (now spread out throughout space) formed quarks which grouped together to form baryons - some of which are the protons and neutrons we know today. Later on (but still within the first second), electrons formed, and, gradually, the particles we know today came into being.
The objects you're talking about formed 420 million years after the Big Bang - way after inflation! They were never close together; however, their constituent particles were. The reason they are so far away now is mostly because of inflation, but also partly because of the current expansion of space, which comes courtesy of dark energy. The reason we can see these objects in all directions is because inflation made space expand in every direction, so matter is, therefore, in every direction.
I hope this helps.