Conspiracists and UFO seekers have been claiming for years that a mysterious celestial body called Planet X or Nibiru was hidden away in our solar system.

But the rejoice at "being right" soon turned to panic because they also believe Nibiru would one day pass Earth so closely the gravitational pull would start massive earthquakes and volcanic eruptions on our planet, spelling the end of all life.

Videos posted online at the end of last year even claimed Nibiru would pass us by the end of 2015 or by April 2016.

So news of the announcement over Planet Nine yesterday has only fuelled them further.

This week it emerged Planet Nine would be about 10 times bigger than the Earth and thought to be gaseous, if the scientists's calculations are true.