As you may or may not know, earlier this year some Caltech Researchers predicted the existence of a 9th planet with a very eccentric orbit.
https://www.caltech.edu/news/caltech-researchers-find-evidence-real-ninth-planet-49523
They asked for the public's help in finding the planet. So far, nothing. Though there was some news today that there is more indirect evidence for the existence of Planet 9.
http://www.digitaltrends.com/cool-tech/month-planet/
So where is it? I figured I'd ask CR4. If your answer is "Where ever Pluto is", I'm with you, but then I will have the immediate followup question "Where is Planet 10?"
Here is a blog to help you get started finding it:
http://klotza.blogspot.com/2016/03/where-might-planet-nine-be-hiding.html
"Almost" Good Answers: