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There is another massive planet in our solar system

Why Can't We Find Planet 9? Deep in the outer reaches of our solar system, far beyond Neptune and Pluto, something massive is ...
Yahoo

A 9th planet in our solar system might be found — and no, it’s not Pluto

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...
Amazon S3 on MSN

Is there a secret planet in our solar system?

Scientists believe our solar system may be hiding a secret world — and it’s not the famous Planet X :eyes: A new study ...
Live Science

'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth than the hypothetical Planet X, which astronomers have been hunting for ...