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Astronomers may have found the first known extragalactic exoplanet
By Lisa Grossman
Astronomers spot first possible exoplanet outside our galaxy
By Linda Geddes
Scientists may have found a planet outside of the Milky Way galaxy for the first time
By Sharon Pruitt-Young
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Signs of first planet found outside our galaxy
By Paul Rincon
Astronomers have found what may be the first exoplanet in another galaxy ever detected
By Chelsea Gohd
A possible planet candidate in an external galaxy detected through X-ray transit
By Rosanne Di Stefano, Roberto Soria & Nia Imara
NASA discovers first possible planet outside our galaxy
By Amy Woodyatt