(duration ~ 14:00)
acoustic guitar and piano

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Program note –
Jovian Moons is a set of fantasies for guitar & piano inspired by the unique characteristics of Jupiter’s four largest moons.
Known as the Galilean satellites after Galileo Galilei, who discovered them in 1610, these moons are particularly intriguing since each exhibits its own distinctive properties. Recent exploration by the Galileo & Voyager missions into outer space has brought the provocative features of the moons into focus for the first time, presenting evidence of fantastic & unimaginable alien worlds.
1. Ganymede.
Ganymede is the largest satellite in the solar system. If it orbited the sun instead of Jupiter it could be classified as a planet. Ganymede’s mantle is most likely composed of ice & silicates & its crust is probably a thick layer of water ice. It has mountains, valleys, craters & lava flows & certain regions exhibit a bizarre, grooved surface of complex patterns.
2. Europa
Europa is bright & smooth with an almost complete absence of craters.
Its surface looks like broken glass that has been repaired by an icy glue oozing up from below.
Low ridges, straight & curved, crisscross the surface. Flows & fractures, pits & frozen puddles all hint at a unique geologic history. It is thought that volcanoes of liquid ice may be a regular event on Europa.
3. Callisto
Callisto is the outermost of the Galilean satellites & orbits beyond Jupiter’s main radiation belts. It is a cold icy ball, densely covered in craters & thought to have been dead for billions of years.
4. Io
Io is the most volcanically active body in the solar system. The gravitational influence of the large moons Europa & Ganymede on Io’s orbit of Jupiter create tremendous tidal forces that are the cause of immense volcanic activity.
Oceans of liquid sulphur lie beneath the crust & the surface is constantly renewing itself, filling in any impact craters with molten lava lakes & spreading smooth new floodplains of liquid rock. The surface is very colourful, mottled with red, yellow, white & orange – black markings.
Jovian Moons was commissioned by Musica Viva for Slava Grigoryan & Simon Tedeschi in 2001. It was  then revised in 2002 for performances by Slava Grigoryan & Michael Kieren Harvey.