Pale Blue Dot was inspired by the now-famous snapshot from Voyager II, taken over 6 billion miles away from the Earth in 1990. The photograph shows the Earth as a tiny bluish speck suspended in a beam of light from the sun. From that distance and with the current technology, in this standard-side picture, the Earth is the size of a half of a pixel. The acclaimed astronomer Carl Sagan (who actually directed Voyager to turn its camera and take the photo) wrote a book entitled Pale Blue Dot wherein he muses and extrapolates on both the history and future of humanity in space. It is from these ideas that this ballet grew.
The plot itself follows the first human explorer to leave the solar system, alone, on a one-way trip without a destination. An alien explorer, also flying solo, in encountered. The alien has been gathering data on the Earth for many millennia, and the two have a conversation on topics ranging from environmentalism to human nature, religion, and our eventual place in the universe.