This is a bit dated, but recently via FlowingData I learned about Paul Bourke’s planetarium video of what it would be like to fly through the known universe:
Based off a 5-year survey of the Southern Hemisphere by the University of Western Australia, Bourke begins at the known edge of the universe, where telescopes are essentially peering back into time since the light from these regions have traveled so far.
As the 140 second video progresses, time and distance pass to reveal galaxies forming and linking into vast super structures. When you think that galaxies contain from as little as 10 million to as many as 100 trillion stars, a video like this is mind-boggling.
And this is just the Southern Hemisphere…