Source: United States & Canada – South China Morning PostFor the first time in history, astronomers believe they have found signs of a planet outside our galaxy.Around 28 million light-years away, a Saturn-sized planet in the spiral galaxy Messier 51 could exist, according to a study published on Monday in Nature Astronomy.All exoplanets – a planet that orbits a star outside the solar system – discovered so far have been less than 3,000 light-years away.A light year is how far light travels in one year. Light travels 5.88 trillion miles (9.46…Read More