UPR Professor explains why the existence of a ninth planet is inferred

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Michelle Estades
De confirmar la existencia de este objeto, los astrónomos tendrían que ver si sus características concuerdan con las tres especificaciones que definen un planeta. (Eric Vanderpool/ Flickr)

José Alonso Costa, Physics and Astronomy Professor at the University of Puerto Rico at Cayey, explained why the announcement of a ninth planet in our Solar System was rushed since its existence has yet to be confirmed via telescopes. 

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