Millers Point, Sydney Observatory, stone pyramid

This historic stone pyramid is a survey marker or trig station which stands in front of the Sydney Observatory at Millers Point. It was erected in 1880 on the Sydney meridian, which is the line passing through the Observatory’s Transit Circle Telescope and running north-south. By observing stars, astronomers could establish both its longitude, how many degrees it was located to the east of Greenwich Observatory and its latitude, how many degrees it was to the south of the equator. This stone marker with its highly accurate position would have been essential for 19th century surveyors to use in any surveys of Sydney. The white structure adjacent to the survey marker is a weather station. 

 Click here to view all participants of Outdoor Wednesday