About: http://webisa.webdatacommons.org/298947160

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	Her post is an excellent introduction to the concept of ???standard candles???, astronomical objects whose intrinsic brightness is either known or can be determined in a straightforward way.
http://www.w3.org/ns/prov#wasQuotedFrom	galileospendulum.org