So, according to Wikipedia’s article on The Universe (aside: they have everything on there), the approximate age of the universe is 13.7 billion years. In the same article, they state that the approximate size of the known universe is 78 billion light years.
With everything starting from one point at the big bang, it seems like the maximum possible diameter for the universe would be 13.7 x 2 = 27.4 billion light years. Somehow, it seems that the outer reaches of the universe have been moving at an average speed of almost 3 times the speed of light, which is against the law. Something must be done.
Assuming that Wikipedia’s not totally on crack (a distinct possibility), physicists, please enlighten me.