1 Dec 00:00 AEDT (30 Nov, 13:00 UT) 15 Dec 23:00 AEDT (12:00 UT) 31 Dec 22:00 AEDT (11:00 UT) The chart accurately matches the sky on the dates and times shown for Sydney, Australia. The sky is differ

For those dreaming of the joys of owning a yacht, Nick Ridley offers encouragement as well as a look at the harsher reality of financing your dreams

Topping up the batteries with solar power has never been easier, says Ali Wood, but how do you decide which type to buy?

Understanding buoyage and how to use it is ...

Tony Moss and his wife Marike cross the North Sea to sail around Britain anticlockwise, braving the Scottish summer along the way

Measuring time using the Earth’s rotation was always an imprecise business, so now we do it using the ‘tick’ of an atom