About: http://webisa.webdatacommons.org/147279105

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	They used to closely monitor the movements of the earth (the Sun with respect to the earth), the moon, and other planets.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com