About: http://webisa.webdatacommons.org/401532290

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	The spiral is a spiral because all the gas in it is moving rapidly outwards from the rotating rocket at the centre.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com