This is an awe-inspiring journey out to the limits of the known universe, put together by the American Museum of Natural History:
If you're wondering, as I was, why the moon is barely visible in that film, take a look at this brilliant image by Drew Olbrich that shows the Earth and Moon, and the distance between them, to scale:
As Drew says, its amazing to think of the astronauts of the Apollo space program going all the way from there to there.
The 'Known Universe' video is reminiscent of the 1977 classic Powers of Ten, which takes a similar journey out, and also an additional journey down to the microscopic. Powers of Ten is sporadically available on YouTube, or else see the official site.
And no journey out to the limits of the universe is complete without this: