The Planets, a suite with seven movements, was written by the English composer Gustav Holst between 1914 and 1916. Each movement of the suite is meant to represent a different planet: This one, the second movement, is meant to represent the planet Venus.
Unfortunately, there is not a lot of good footage of the planet Venus to use along with the music, and it sounded so peaceful and calm that I thought it would be nice to have some peaceful footage of nebulae and other astronomical phenomena behind it.