Perhaps the first planet outside our galaxy has been observed, it would be about the size of Saturn and is located in the galaxy Messier 51, 28 million light years away.

Authors of the sensational 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.

(Unioneonline / L)