(ANSA) - ROME, OCTOBER 26 - The first planet has perhaps been observed outside our galaxy, it would be about as big as Saturn and is located in the galaxy Messier 51, 28 million light years away.
Authors of the discovery an international group led by the Harvard-Smithsonian Center for Astrophysics in Cambridge, USA, which published the results in Nature Astronomy.
The discovery was made using an innovative method that studies X-rays observed by NASA's Chandra space telescope.
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