The French mathematician Urbain Le Verrier cracked the nut, suggesting the wobbles revealed a hitherto unseen eighth planet, and pinpointed where it must be. (newscientist.com)
In talking about the two new planets, NASA focused less on Kepler - 80g and more on Kepler - 90i because it was found to be the eighth planet orbiting the only star in its solar system. (fortune.com)
Identifying exoplanets with deep learning: a five planet resonant chain around Kepler - 80 and an eighth planet around Kepler - 90. (sciencenews.org)