Looking back to the edge of the universe, approximately 13 billion years, 400 and 800 million years after the big bang. This is a hunk of the sky is approximately one tenth of the angular diameter of a full moon viewed from Earth. This tiny part of the sky has an estimated 10,000 galaxies. It is a an area that looks like there is nothing at all to the naked eye.
https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field