The dance celebrates the first detection by the <<https://en.wikipedia.org/wiki/LIGO|LIGO detector>> of gravitational waves produced by two black holes circling and merging together over a billion light years from Earth. This event was observed on 14 September 2015 almost exactly a century after the existence of gravitational waves was predicted by Einstein in his General Theory of Relativity.

Bars 5-12 represent the LIGO detector which has two 4 km long arms arranged in an L shape. Bars 13-16 show the circling and merging black holes. The wiggly reels are the resulting gravitational waves and the final circle is for the <<https://www.nobelprize.org/uploads/2018/06/press-40.pdf|Nobel Prize>> medallions awarded by the Swedish Academy in recognition of this amazing scientific achievement.

A recording by Ian Robertson of the music for this dance is available via <<https://my.strathspey.org/u/murrough/recording/>>.
