If you’re more interested in viewing the planets in our solar system we already know are there (as opposed to a potential “new” ninth one), take a look at the sky in the next weeks.
Earthsky: See all five bright planets simultaneously! “All five bright planets will appear together in the morning sky from about January 20 to February 20, 2016. That hasn’t happened since 2005.”
NPR: For The Next Month, 5 Planets Will Align In Early Morning Sky. “As of today, you can see all five planets that are possible to see in the sky with the naked eye early in the morning. NPR’s Robert Siegel talks with astronomer Jackie Faherty about why this is happening.” (NPR media player and transcript)