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It’s a stirring thought: a planet around 10 times bigger than Earth orbiting the sun, lurking somewhere in the vicinity beyond Neptune. But no actual planet has been discovered yet – and a NASA scientist cautioned against claiming its existence at this point.
“It is not, however, the detection of a new planet,” NASA director of planetary sciences Jim Green clarified in a video released by the space agency. “It’s too early to say with certainty that there is a so-called ‘Planet X’ out there.”
Strange new subatomic particles discovered at atom smasherBy Edwin CartlidgeJul. 14, 2015 , 6:00 PM