About: http://webisa.webdatacommons.org/85966502

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 Discovery of the Horsehead Nebula in the 19th Century, and other developments related to the study of faint and dark nebulae by eye and early astrophotography. (Some improved images, and additional text, added in 2012-14.)
http://www.w3.org/ns/prov#wasQuotedFrom	freescruz.com