Sundial

Period

c. 1500 BC

Map

Inventions map

A sundial is a horological device that tells the time of day when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate and a gnomon, which casts a shadow onto the dial. As the Sun appears to move through the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day. The style is the time-telling edge of the gnomon, though a single point or nodus may be used. The gnomon casts a broad shadow; the shadow of the style shows the time. The gnomon may be a rod, wire, or elaborately decorated metal casting. The style must be parallel to the axis of the Earth's rotation for the sundial to be accurate throughout the year. The style's angle from horizontal is equal to the sundial's geographical latitude.

Sources: Wikipedia — Sundial · CC BY-SA 4.0

Earlier and later events nearby

1. c. 3100 BCNarmer unifies Egypt
2. c. 2560 BCConstruction of the Great Pyramid of Giza
3. c. 1500 BCSundialThis page
4. AD 639–642Arab conquest of Egypt
5. AD 970Al-Azhar University
6. 1011–1021Ibn al-Haytham's Book of Optics

Who ruled this land

States that held this place in the historical borders data (Cliopatria). Years are approximate, as fine as the data's snapshots (every few years to a century). Tap to open the map for that year.

Other maps for this period

• Religions mapHinduism