About: http://webisa.webdatacommons.org/91462377

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	gravity gradient Refers to the difference in the acceleration of gravity from one side of an object to another, because gravity is a force that changes with distance between two points.
http://www.w3.org/ns/prov#wasQuotedFrom	nasa.gov