The edge of the universe could be defined as the distance that light has travelled since the universe got started. This is not a real, physical edge, but is simply the limit to the universe that we can observe. The age of the universe is thought to be several billion years old. As yet, no galaxies have been observed "at the edge of the universe", they have been only observed several billion light years away, until now. Watch the videos below. Real or not, our universe is stunning!
These observations can be thought of as looking back in time. The galaxies that are observed are younger than our own. This is one way that astronomers attempt to study how galaxies evolve in time. If one were to look to very great distances, one might hope to see galaxies forming, and going even further back, one can see the remnant of the big bang fireball, from which the whole universe emerged.
Journey to the Edge of the Universe
The Hubble Deep Field: The Most Important Image Ever Taken
In 2003, the Hubble Space Telescope took the image of a millenium, an image that shows our place in the universe. Anyone who understands what this image represents, is forever changed by it.
Carl Sagan's Cosmos - Star Stuff
Carl Sagan's description of how we evolved from "Star Stuff" and are on our journey to go back to our origin - in the Stars. From "Cosmos: A Personal Voyage" episode 8, "Journeys in Space and Time".
-DarkStar888...These 3 videos say much. ENJOY!