Archeologists in Egypt have discovered “the first and largest astronomical observatory,” nearly half a mile long, dating to the 6th century BC. A sundial ... to the Egyptian Ministry of ...

The inventions of the hemispherium and the hemicyclium are attributed to Berosus (356-323 BCE), a Chaldean priest and astronomer who brought these types of sundials to Greece. Both dials use the shape ...

This elegant yet strong option is perched atop a half-globe and boasts an arrowhead gnomon which pierces through a hollow ...