Matches in DBpedia 2015-10 for { ?s ?p "OJ 287 is a BL Lac object located 3.5 billion light years away that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. It has been seen on photographic plates since at least 1887. It was first detected at radio wavelengths during the course of the Ohio Sky Survey."@en }
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- OJ_287 abstract "OJ 287 is a BL Lac object located 3.5 billion light years away that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. It has been seen on photographic plates since at least 1887. It was first detected at radio wavelengths during the course of the Ohio Sky Survey.".
- OJ_287 comment "OJ 287 is a BL Lac object located 3.5 billion light years away that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. It has been seen on photographic plates since at least 1887. It was first detected at radio wavelengths during the course of the Ohio Sky Survey.".