Nibiru would strip the moon from Earth;s orbit of it ever passed us, a NASA scientist said.
Dr David Morrison, an astronomer at NASA Ames Research Center, said if the system made it into the inner solar system, it would disrupt the position of the all planets, and “eject the moon from Earth’s orbit.”
The internet has been alive with conspiracy theories claiming the Nibiru or Planet X system is heading towards Earth, and will trigger a global apocalypse from Sunday, November 19.
So-called Nibiru truthers claim NASA is at the heart of a global elite conspiracy to hide the truth from the general population while they seek refuge in secret underground bunkers.
The Nibiru myth emerged in 1976, when writer Zecharia Sitchin claimed two ancient Middle Eastern cultures, the Babylonians and Sumerians, told of a giant planet dubbed Nibiru which orbited the Sun.
And the Nibiru or Planet X theory claims a mini solar system consisting of a sun, planets and moons is lurking in space on the edge of our system with a huge 3,600 miles orbit of the sun.
They say the planet will cause the poles to switch, sparking great earthquakes and volcanic eruptions.
But Nasa has repeatedly said Nibiru does not exist.
Dr Morrison was speaking during a podcast released by the Search for Extraterrestrial Life Institute (SETI) website.
It was part of the Big Picture Science Radio Show, which broadcast an episode called “Skeptic Check: Nibiru! (Again!)”
Mr Morrison was asked to say what would happen in the solar system if Nibiru entered it.
The planet’s orbits are very regulated, and, if some massive object came along every so often and came through the inner solar system, it would all be screwed up, the planets would not be coplanar. The moon would have been ejected.
He said: “If a big object was coming into the solar system its gravity would perturb the orbits of the planets, and we would have detected that long before it came close to the Earth.
“The planet’s orbits are very regulated, and, if some massive object came along every so often and came through the inner solar system, it would all be screwed up, the planets would not be coplanar.
“The moon would have been ejected, and obviously that is not the case.”
However, Dr Morrison, said it was pointless describing what would happen as “Nibiru does not exist.”
Dr Morrison said: “If it came into the inner solar system, it would destroy the planet’s orbits.
“What the resulting configuration would be, no one would know, because it does not exist and we don’t know its mass, it is just a crazy idea.
“There is no observational evidence whatever.
“Astronomers keep track of happens in the universe very well and astronomers have never reported this.”
He said he felt compelled to speak out to say Nibiru does not exist because NASA has forwarded thousands of calls from curious and panicked members of the public, including children.
Dr Morrison said: “One worried man asked me if he should go to work or stay at home with his family.”