Short summary: Planet X might exist - the first “Planet X” was Pluto. If so it’s a planet way beyond Neptune and is of no threat to Earth. Nibiru is a hoax or a crazy idea which is astronomically impossible.

In detail

Planet X might exist - it’s the idea of a planet that could orbit way beyond Neptune. It’s not a single object. The first “Planet X” was Pluto before they called it “Pluto” and the word is now used by astronomers to refer to any theory for a new planet in our solar system. There “X” stands for “unknown” not for “ten”.

So there are many ideas for planet X - over the years, but nearly all have been disproved. The conspiracy theory websites claim that they are all the same planet which has been monitored by NASA since the 1980s - but they are combining together many ideas, most disproved long ago.

Some haven’t been disproved yet, and the main one remaining, or at least the one that got most publicity, is the so called “planet 9”. It may be the best candidate yet, but it also has not been proven to exist yet. It’s just a hypothesis.

Anyway, all of these are ideas for planets that would orbit way beyond Neptune. They would be of no more danger to Earth than Neptune or Pluto. If any of these planets exist they never come anywhere close to Earth.

The idea of “Nibiru” is an astronomical absurdity. They claim that it crosses the orbits of all four of the gas giants, Jupiter, Saturn, Uranus and Neptune and also Mars and Earth. That’s not a stable orbit. Perhaps there could be something in an orbit like that around the time the Moon formed when the solar system was filled with debris, but it wouldn’t be able to last in that orbit for as long as a million years. So - such an object just can’t exist today. It would have hit the Sun, Jupiter, been ejected from our solar system or hit one of the smaller planets at least 4.5 billion years ago.

I have done many debunking articles to help with this, But this is a good start, if you still have questions about whether it could be real:

• Nibiru Bullshit Tester - How to check if they know anything about astronomy
• Debunked: Nibiru will hit Earth on [Insert Date here]

And here is a List of the articles in my Debunking Doomsday blog to date