Astronomers have discovered an exoplanet candidate in Messier 51

NASA has announced that scientists have discovered a planet transiting a star that lies outside the Milky Way galaxy for the first time. The exoplanet candidate was discovered orbiting a star in a spiral galaxy called Messier 51 (M51). That galaxy is also known as the Whirlpool Galaxy because of its distinctive appearance. Any planet outside of our solar system …