About: http://webisa.webdatacommons.org/197646550

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	Since black holes a billion times the mass of the Sun exist just 1 billion years after the Big Bang, this theory is a tempting alternative despite its difficulties.
http://www.w3.org/ns/prov#wasQuotedFrom	skyandtelescope.com