Astronomers have likely discovered the first planet ever outside the Milky Way, which is about 28 million light-years from Earth. Experts using NASA's Chandra X-Ray Observatory and the European Space Agency's XMM-Newton telescope may have discovered the planet in the spiral galaxy Messier 51 (M51), also known as the Whirlpool galaxy. Nasa finds first ever planet outside our galaxy https://t.co/wRodBg5OOD — The Independent (@Independent) October 25, 2021 All of the ...