"Dark Was the Night, Cold Was the Ground" by Blind Willie Johnson.
The farthest man-made object from Earth is the Voyager I probe, launched in 1977. Packaged inside it is a gold-plated record, explaining things about humans. On one side are pictographs, and on the other side, it's a playable sound record. It has many things on it, but one of those things is a song that was chosen to represent the idea of loneliness. That was this song.