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Πέμπτη 21 Ιανουαρίου 2016

Astronomers say a Neptune-sized planet lurks beyond Pluto


A new paper from one of the discoverers of dwarf planets Eris and Sedna provides indirect evidence that there is a large planet orbiting the Sun much farther out than Pluto.

Planet would orbit the sun once every 15,000 years
SCIENCEMAG.ORG

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