During our Space topic, we looked into the history and science of sundials. We learned that sundials are the oldest known instruments for telling time. The surface of a sundial has markings for each hour of daylight. As the Sun moves across the sky, another part of the sundial casts a shadow on these markings. The position of the shadow shows what time it is. We also learned that if the sun disappears behind buildings or lamp posts in our case, it is impossible for the sun to cast a shadow on the markings.
Our sundial design was constructed in an afternoon from household materials, but it’s surprisingly accurate. Perfect for us amateur astronomers!