Voyager 1 data used to create musical tribute on its 40th anniversary
A piece of music has been created using data beamed back to Earth from Nasa’s Voyager 1 spacecraft in honour of the 40th anniversary of its launch.
The three-minute work is based on information captured by a special telescope aboard the craft which is designed to identify protons, alpha particles and heavier nuclei in space.
Scientists used 40-years of data, stretching back to 1977, to create a melody that follows the journey of Voyager 1.
Each number, representing an average 26-day measurement received by Nasa’s space physics data facility from the telescope, called a low-energy charged article (LECP) instrument, is converted into a musical note.
To produce the music, Dr Domenico Vicinanza, of Anglia Ruskin University and Europe’s high-speed data network Geant, and Dr Genevieve Williams, of the University of Exeter, used a process called data sonification.
It involved mapping the recorded measurements and flight characteristics to melody, harmony and orchestration.
Measurements coming from the telescope depict the dramatic changes detected first when Voyager 1 approached Jupiter, then Saturn and finally when it left the solar system in 2012 and entered interstellar space, which is the region between stars filled with material ejected by the death of nearby stars millions of years ago.
It is currently the only manmade probe to have left the solar system and it has a long-lasting nuclear-powered battery, which allows it to continue to communicate with the US space agency across billions of miles.
Dr Vicinanza, director of the sound and game engineering (Sage) research group at Anglia Ruskin University, said: “Our orchestra score is more than just inspired by one of the most successful space missions of all time, it is shaped entirely by Voyager 1’s incredible journey.
“Data sonification can play an important role in helping to share scientific discoveries and we hope that by converting 40 years of data into music, listeners will be able to hear aspects of Voyager 1’s journey that are perhaps not so obvious when looking at graphs of data.”
The main melody comes from the sonification of the cosmic ray count and is played by the second violins for data up until 2012, and then by flute, piccolo and glockenspiel.
Piano and French horns double the violins during the Jupiter and Saturn encounters, highlighting the rising and falling of the cosmic ray count while entering and exiting the atmospheres of the planets.
The transition from the heliosphere to the interstellar space is accompanied in changes in the orchestration and harmony, as well as a change in the music key (tonality) from C major to E flat major.
The music will receive its world premiere at the SC17 supercomputing conference in Denver, Colorado, on 13 November.