The transit of Venus (the planet passing in front of the Sun) in 2012 will be the last in our lifetimes. (The next will be in 2117).
In collaboration with LightCurve Films, a 'music video' was made for the event, supported by the European Planetology Network (Europlanet, europlanet-eu.org).William performs on the glass armonica in the video, and also wrote the score.
Astronomers Without Borders covered the transit live via webcast, and this video was webcast during their coverage of the transit to about 2 million viewers.
The video can also be seen on YouTube: