About: http://webisa.webdatacommons.org/230807181

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	These particles, known as cosmic rays, are accelerated to about 99% of the speed of light by extreme astronomical phenomena, such as supernovae and exploding galactic centers.
http://www.w3.org/ns/prov#wasQuotedFrom	sciencenonfiction.org