Astronomers talk about very large, very fast moving objects at the edge of the universe, +/- 15 billion light years away. This also means that the astronomers are looking at objects from +/- 15 billion light years ago, around the time of the big bang.
Are not these objects, then, at the centre of the universe?
How is it possible to be looking at both the edge and the centre of the universe at the same time?
Where exactly are astronomers looking when they say the edge of the universe?
Val Fraser
Good question Val - any cosmologists out there with an answer? Ed.