About: http://webisa.webdatacommons.org/278629915

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	It is the darkest line, and relatively wide, because the sun is mostly hydrogen, and it is this gas that predominates the layers of the photosphere.
http://www.w3.org/ns/prov#wasQuotedFrom	cloudynights.com