The star, called Kepler-90, is located in the Draco constellation. It is the first known star to have as many planets orbiting it as our solar system does, NASA said.
NASA scientists had known about seven planets orbiting Kepler-90. The eighth planet -- dubbed Kepler-90i -- is a hot, rocky planet that orbits its star once every 14.4 days, NASA said. By contrast, in our solar system, Mercury, the closest planet to the sun, has an orbit of 88 days.