PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The next step was to prove that the Milky Way was a flattened disk.It took another giant leap forward in telescope technology ??? and obsessive soul who knew how to exploit it - to produce the proof of Kant???s assertion.From the telescope???s very beginning in 1608, astronomers had noticed that lens-based refracting telescopes had their limitations.
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  • delgazette.com