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New planet outside of Milky Way may have been spotted, researchers say
By Denise Chow
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NASA discovers first possible planet outside our galaxy
By Amy Woodyatt
A possible planet candidate in an external galaxy detected through X-ray transit
By Rosanne Di Stefano, Roberto Soria & Nia Imara
Nasa finds first possible planet outside our galaxy
By Andrew Griffin
Signs of first planet found outside our galaxy
By Paul Rincon
Scientists may have found a planet outside of the Milky Way galaxy for the first time
By Sharon Pruitt-Young