season

Armillary sundial reads summer solstice by a ball shadow at noon

At the summer solstice the armillary sundial casts a shadow of the ball at noon

At summer solstice the ball on the upper tropic ring casts its shadow exactly onto the opposite ring below. The upper tropical ring is the tropic of Cancer and lower ring is Capricorn.

The armillary sphere dates back to ancient times when astronomers created their own vision of the earth and the heavens. The idea still works today and our own design creates a sundial with a special feature of two balls that mark the passage of the seasons by their shadows. One of the balls reads summer solstice. This is the high point of the year when the sun is highest in the sky.

The balls are carefully positioned at the meridian point on two tropical rings, the upper one on the Tropic of Cancer and the lower one on the Tropic of Capricorn. When the sun is at noon, the highest point of the day, the ball on the Tropic of Cancer casts its shadow right across the sundial to the opposite tropical ring, exactly at summer solstice. This year the actual time of the solstice is 9.13am GMT (10.13am BST) on 21st June 2022. You will find a full explanation of summer solstice at the Royal Museums Greenwich.

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An armillary sundial in early morning

An armillary sundial in early morning

This is our new sundial design. It stands in our garden among the plants. It is early morning and the sun has just reached the centre band where you read the time.

An armillary sundial has a wonderful form. It has mathematical rings creating beautiful shapes with circles and lines. The sundial in the photo has just begun to catch the early morning sun in the garden.

The sundial gnomon is the slanting rod in the centre of the rings, and the wide sweeping band is where you can read the time. These features are the same as other armillaries, but our design has special secrets. Continue reading

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Summer solstice and a silver sundial

Dihelion dual sundial in silver

Silver Dihelion dual sundial sculpture able to read solstice and equinox, summer, winter, spring and autumn seasons, and the daytime hours.

Summer Solstice 2020 in Edinburgh was a day of beautiful sunshine. What could be a better time to show off our Dihelion dual sundial, which can read the solstice and the equinox seasons and the daytime hours. Shifting patterns of sunlight and shadow and petals of the sunflower show through so clearly. There is a lovely Continue reading

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