BC Gnomonics

The Phalara Dial As part of a 2010-2011 excavation, a sundial was discovered at the site of ancient Phalara (modern Stylis, Greece). The...

Two of a kind The scaphe and hemicyclium each do an excellent job of imaging the celestial sphere in microcosm, arguably more intuitively...

Wooden and paper astrolabes Though the vast majority of surviving astrolabes are made from durable materials such as brass, these were...

Specialized sub-types of the OERD While the equatorial ring dial sits at both the end and peak of portable sundial development, it has...