"Dark Was the Night,Cold was the Ground" written and performed by Blind Willie Johnson on The Voyager Golden Record.

http://voyager.jpl.nasa.gov/spacecraft/music.html

The Voyager Golden Record is a phonograph record included in the two Voyager spacecraft launched in 1977. It contains sounds and images selected to portray the diversity of life and culture on Earth. It is intended for any intelligent extraterrestrial life form, or far future humans, that may find it. The Voyager spacecraft will take about 40,000 years to come near another star, 'near' meaning in this case within around 1.7 light-years' distance; hence, if other beings do not come in the direction of the spacecraft to meet them, it will take at least that long for the Golden Record to be found.

As the probes are extremely small compared to the vastness of interstellar space, it is extraordinarily unlikely that they will ever be intercepted. If they are ever found by an alien species, it will be far in the future, and thus the record is best seen as a symbolic statement rather than a serious attempt to communicate with aliens.