Planet X or Nibiru
There is a theory that Planet X, or Nibiru, will collide with or pass by Earth in 2012. Nibiru means “planet of the crossing”, and every 3,630 years, it crosses the Earth’s orbit. It is massive, estimated to be five times larger than Earth, with at least one hundred times the mass of Earth and a powerful magnetic core that will disrupt any planet it passes.
When Planet X comes close to Earth, it may cause earthquakes, volcanoes, tidal waves, melting of polar ice caps, fluctuations in temperature and climate, or shifts in the polar axis of the earth because its gravity will affect our planet.
Planet X was discovered in December 1982, and NASA made an announcement about the planet. Shortly thereafter, they retracted the story. Many people believe that an executive decision was made to suppress all information about the planet because they feared it would cause worldwide hysteria, panic and anarchy. The believers also point to recent sightings of Planet X, the use of the Hubble Telescope to track the planet, as well as other observatories they believe were specifically built to study Planet X.
Naysayers point to author Zecharia Sitchin, who studied Sumerian cuneiform. He wrote about the planet the Sumerians called Nibiru in his book, The Twelfth Planet. They believe Sitchin created a fictionalized world, though he claims that ancient Sumerian writings suggest that Nibiru is inhabited by the Annunaki, who came to Earth to mine for gold. They created man to help with the task, but two groups of Annunaki went to war, and destroyed each other. No Annunaki are on Earth now because Nibiru had moved too far away from the Earth for others to come.
NASA calls Nibiru an “Internet hoax” and says that if there were a large planet coming toward Earth, many people would be tracking it. We would also be able to see it with our own eyes, even if it is hiding behind the sun, as the believers posit.