A Merry Tough Christmas Navigation Riddle
This time of year poses some logistical challenges for Santa and his team. Can you help him? Few people realise that in order to be…
Explore the Books
Tag: equinox
Equinoctial Gales
There is a widely held and strong belief that gales are more frequent at the equinoxes, but the observations don’t really support this. According to…
The Equinox. It’s as clear as night and day.
When does the line between day and night become vertical? By which I mean, when does it run from the North Pole straight down to…
When’s Easter?
Happy Easter! When is Easter? Today, is the short and not very helpful answer. The longer, more useful answer is: Easter is always the first…
Chankillo and the Solar Triangle
In the desert of western Peru there are the remnants of a civilization that still holds many mysteries. Archaeoastromomers are able to deduce a few…
That Sudden Autumn Feeling
Have you had that feeling recently that the season has not so much shifted to autumn, as snapped? There is a time each year when…
Ground Moisture
Happy New Year! At times like this, I sometimes wonder what the Earth and Sun would say to each other if they could talk. They…
Happy Spring Equinox!
Happy Spring Equinox! My plans this morning, as announced in the Telegraph, were to head to the top of a hill and catch the sun…
A Spring Journey
This photo of the roof of my home tells a story of the sun’s journey. The morning shadow from the dormer window is retreating and…