About: http://webisa.webdatacommons.org/89283664

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	Of course there are many other explanations for difference between calculated and observed mass, but currently Dark matter is the most popular hypothesis.
http://www.w3.org/ns/prov#wasQuotedFrom	uncommondescent.com