About: http://webisa.webdatacommons.org/405662151

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	Their great luminosities allow them to be seen at enormous distances, and since light travels at a finite speed, quasar maps provide a glimpse of structure when the universe was a small fraction of its current age.
http://www.w3.org/ns/prov#wasQuotedFrom	usra.edu