About: http://webisa.webdatacommons.org/22562327

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	These spheres are tools used to determine coordinates and other values, and the demonstrational spheres appear to just give relative motion of bodies about earth.
http://www.w3.org/ns/prov#wasQuotedFrom	muslimheritage.com