"Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretches 4 billion light-years from end to end. "

http://www.msnbc.msn.com/id/50434185/ns/technology_and_science-space/#.UPFwQ3fVong

This is what I was looking for when I clicked the link, maybe we'll get some cool new theories.

shit just got real

That's pretty cool. Isn't the universe supposed t be like 15billion light years across?

not a definite size, we can calculate the approximate expansion vs time, which we also know approximately, so idk if your numbers are correct, you can google it if u want a more exact value

The edge of the observable universe (the surface of last scattering) is about 46 billion light years away, so the diameter of the observable universe is about double that.