PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • So far the method used by Chen and others is working, lunar telescope builders would not even need a vacuum chamber, thanks to the moon's lack of atmosphere.There are a few challenges however, such as lunar dust contamination that builders would have to somehow prevent while working.
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  • physicscentral.com