About: http://webisa.webdatacommons.org/127120801

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	Space is filled with air (though it gets purer as one goes higher ??? which can cause problems) and navigation is a matter of flying to a planet, slipping underneath the edge of the Crystal Sphere, and flying to the next one.
http://www.w3.org/ns/prov#wasQuotedFrom	earthlink.net