The coloured points on the mountain top represent spectroheliostats, these contain prisms which are calibrated to refract the light from the sun at different positions. The colours alternate as the prisms change position and also differ relative to the position of the observer. The result is a magnificent display of the coloured lights choreographed in the natural landscape, highlighting the underlying physical process of light travelling from sun to eye.
This was made for artist Liliane Lijn and astrophysicist John Vellerga's beautiful 'Solar Hills' project proposal:
Solar Hills are large-scale solar installations in the landscape that define the horizon with light. With Solar Hills, we are creating a new awareness of the beauty and poetry of our star.