| http://www.w3.org/ns/prov#value | - were zero indications of the gas cloud.???So that???s how we know this appeared between 2002 and 2006,??? he said.Daniel Progra, a physics professor at the University of Nevada, Las Vegas and an expert on gas outflows from astronomical objects, indicated the discovery is a lucky one.???I am most excited about this work,??? he said. ???We humans cannot directly monitor changes in quasars as they ta
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