About: http://webisa.webdatacommons.org/438283682

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	In an ideal world, where the Sun is perfectly spherical and there is a planet that goes around in an elliptical or a circular orbit, that comes exactly back to where it started, the orbits of the planet are closed.
http://www.w3.org/ns/prov#wasQuotedFrom	gresham.ac.uk