The Pale Blue Dot was made as a tribute to Carl Sagan "as the final project for the Animation 01 course at Ringling College of Art and Design."
Sagan's soothing audio is well-suited for the clean and whimsical designs. The image of The Pale Blue Dot also has a great backstory:
As NASA's Voyager 1 spacecraft was about to leave our Solar System in 1989, Sagan, who was a member of the mission's imaging team, pleaded with officials to turn the camera around to take one last look back at Earth before the spaceship left our solar system. The resulting image, with the Earth as a speck less than 0.12 pixels in size, became known as "the pale blue dot."
Sagan later published a book by that name. The audio clip used is from the Seth Macfarlane collection at the Library of Congress.