Basic survival celestial navigation

How the world’s clocks and geographic coordinates came to be set by a small borough of London

One summer’s evening in the days before internet weather forecasting, I was deeply involved in the after-race ‘do’ following a Solent Old Gaffers event. In the 1970s these regattas drew entrants large

A few years ago, we bought my father a sundial. It was a decent 18th-century style reproduction in lead – something he had wanted for a very long time – and then, inevitably, he asked me to help him s

1 Sep 00:00 AEST (31 Aug, 14:00 UT) 15 Sep 23:00 AEST (13:00 UT) 30 Sep 22:00 AEST (12:00 UT) The chart accurately matches the sky on the dates and times shown for Sydney, Australia. The sky is differ

NEVER STOP SAILING!

◀ Tuesday 2 The Lunar X and V clair-obscur effects can be seen on this evening’s Moon. Your best view will be around 23:41 BST (22:41 UT). Thursday 4 This morning, Titan’s shadow transits Saturn’s glo