NASA's Kepler finds solar system like ours with eight planets

Researchers used data from NASA's planet-hunting Kepler space telescope to discover an eighth planet orbiting a star known as Kepler-90. The planet, dubbed Kepler-90i, is a hot, rocky planet that orbits its star every 14.4 days, and was found with the help of artificial intelligence, NASA said Thursday. The discovery marks the first solar system to tie with our solar system in the number of planets orbiting one star. "The Kepler-90 star system is like a mini version of our solar system. You have small planets inside and big planets outside, but everything is scrunched in much closer," Andrew Vanderburg, a NASA Sagan Postdoctoral Fellow and astronomer at the University of Texas at Austin, said in a statement, Vanderburg and researcher Christopher Shallue, a senior software engineer with Google's research team Google AI, used machine learning to make the discovery.