The Tower of the Winds in Athens included both a sundial and a water clock for telling time. A canonical sundial is one that indicates the canonical hours of liturgical acts, and these were …

Dec 22, 2025 · Sundial, the earliest type of timekeeping device, which indicates the time of day by the position of the shadow of some object exposed to the sun’s rays. As the day progresses, …

A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the Sun casts a shadow from the gnomon, which is a thin rod straight …

Volunteers from the Analemma Society and NASS demonstrated a number of sundial types and provided paper sundial cut-outs that were enjoyed by children, students, parents and teachers …

This set of pages explains, with diagrams, how a sundial works. It begins with the simplest (equatorial) dial where the shadow of a stick (the gnomon) falls on hour lines every 15 degrees …

Jul 28, 2025 · Our collection offers majestic sundials up to 6 feet in diameter, including the Armillary Sundial with Signs of the Zodiac, Armillary Sundial with Feathered Band, and …

Learn what a sundial is, how it works, its invention, types, and uses. Discover easy diagrams and key facts for exams and projects.

Nov 2, 2024 · A sundial operates based on the Earth’s rotation and the sun’s movement across the sky. The most essential component of a sundial is the gnomon, a stick or triangular object …

Mar 10, 2025 · Sundials have been used to measure time, based on the Sun, for thousands of years. This simple device can be made up of nothing but a flat dial and a gnomon (the …

It was the Egyptians that came up with the first sundial in 1500 BCE. Their shadow clock used the changing position of the sun to indicate the time of day. Later, the Greeks and Romans made …