Rainbow Sundial Calendar

A living, glowing Solar Spectrum map of the entire astronomical year, projected into a unique architectural space

Using a skylight, custom prisms, and hundreds of site-specific astronomical calculations, Peter Erskine's unique “Rainbow Sundial Calendar,” transforms ordinary Sunlight and the rotation of the Earth into a radiant, architecturally scaled map of the solar year – inside a building! Powered by the rotation of the Earth, a giant moving cross of solar spectrum color tells the astronomical time and date – for that specific location on the planet. The curving horizontal lines inlaid into the walls and floor indicate the path of the Sun during the months, equinoxes and solstices. The vertical lines show the hours and minutes. Standing inside this living cosmic clock, you can actually “see” the Earth turning under your feet.