Caltech Researchers Find Evidence of a Planet Beyond Pluto
Thanks for the link. There's a course taught on Coursera by one of the CalTech researchers, Mike Brown, if anyone is interested. It's archived but they have kept it open.<p><a href="https://www.coursera.org/course/solarsystem" rel="nofollow">https://www.coursera.org/course/solarsystem</a>