The American space agency NASA and the technology company Google have identified an eighth planet in a faraway solar system. That solar system now has exactly the same number of planets as our own. Machines made the surprising discovery, not human researchers. NASA and Google representatives made a joint announcement about the discovery on December 14. The newly discovered planet orbits the star known as Kepler-90. The system is about 2,545 light-years away. A light-year is about 9.5 trillion kilometers. Researchers have named the planet Kepler-90i. Like Earth, Kepler-90i is the third farthest planet from its sun. However, Kepler-90i is much closer to its sun. It only takes the planet 14 days to orbit Kepler-90. So, its surface is much warmer. 427 degrees Celsius.