Ushering in Planet X by re-branding it Planet 9. Notice how the pictures provided in both articles are nothing more than artistic renderings which is typical for space agency 'photos'. On top of that are the titles of articles linked below a clue that it is not certain at all that this Planet 9 would be real.
The first title is: 'Ninth Planet' MAY exist in solar system: US scientists. May?! Define may:
modal verb: may
1.expressing possibility."that may be true"
How about DOES exist if it is so certain.
The second title is Scientists: GOOD evidence for 9th planet in solar system. Define good:
adjective: good; comparative adjective: better; superlative adjective: best
1.to be desired or approved of."it's good that he's back to his old self"
Does the alleged existence of Planet 9 has your approval? In 'science' one would expect a term like irrefutable or absolute, don't you think?