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Subject Item
dbpedia:Cosmic_distance_ladder
rdfs:comment
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth.
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n6: dbpedia:Stellar_parallax
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