Matches in DBpedia 2015-10 for { ?s ?p "Comets have been observed by humanity for thousands of years, but it is only in the past few centuries that they have been studied as astronomical phenomena."@en }
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- Observational_history_of_comets abstract "Comets have been observed by humanity for thousands of years, but it is only in the past few centuries that they have been studied as astronomical phenomena.".
- Observational_history_of_comets comment "Comets have been observed by humanity for thousands of years, but it is only in the past few centuries that they have been studied as astronomical phenomena.".