PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • (or similar design) on the cheap range (you can actually get a good aperture size (which tends to be the most important measure) for pretty cheap, or if you have the money, go with a Schmidt-Cassegrain (or similar style) telescope with at least an 8 aperture (you might actually be able to find a good one used for well under $1000 if you look hard).There are a lot of other people and institutions
http://www.w3.org/ns/prov#wasQuotedFrom
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