What is the farthest space object that we can see with only our eyes?

The farthest object in space that you can see with only your eyes in the night sky is the Andromeda Galaxy. It is a huge spiral galaxy, and it is the closest large galaxy to us outside of the Milky Way. However, it is so far away that is only appears as a faint cloud in the night sky. The Andromeda Galaxy is about thirteen million trillion miles away!