About: http://webisa.webdatacommons.org/348488542

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	Because of a small periodic oscillation, or wobble, of the Earth???s axis, called nutation, there is a distinction between the true and mean equinoxes.
http://www.w3.org/ns/prov#wasQuotedFrom	britannica.com