December 21, 2018

The Long Hand of Darkness

Mist lifts over the Boyne Valley in Ireland as the Sun dawns on the stone tomb Newgrange. A narrow sunbeam streams through the passage just above the entrance. It reaches the floor and slowly crawls towards the back of an ancient crossed-shaped chamber. The beam of the rising Sun expands, flooding the tomb of ancestral ashes and bones with light for 17 minutes. This Stone-age alarm announces the 355th day of Earth’s year-long journey around the Sun. Today darkness yawns and stretches over the North, its longest stretch of the year. In a wheat field nearby, Aisling glances up to see the Sun tracing its shortest arc. It hasn’t escaped…

December 14, 2018

Music of the Spheres

Humans have been in awe of the harmony of the heavens since times immemorial. Ancient Greeks believed that celestial bodies made music. In the clinging of hammers Pythagoras heard “a clue from God”, or so a folk myth goes. Stretching strings and plucking them, he discovered an intimate connection between mathematics and music, and that objects produced sound when in motion. He was thus convinced that planets moving in orbit should be humming a heavenly tune, and he sought to find the astronomical harmony of the cosmos.   In our modern times, another polymath longed for a similar fulfilment. In 1926 Arthur Eddington, an English astronomer lamented in his book The…