Scientists say that Nibiru is an Internet hoax that does not exist, while believers say that it passed over Earth and is now continuing with its highly elliptical orbit.
Nibiru, or Planet X, is a planet that Zecharia Sitchin first claimed in 1976 after his translation of Sumerian astrological texts. He claimed that the planet completed one orbit every 3,600 years and believed it was connected to the story of Noah and the flood in the book of Genesis. In 1995, Nancy Lieder claimed that she was in contact with natives from the Zeta Reticuli star system and they had warned her that an object would sweep through the solar system and kill most of mankind. This claim has since been connected to Nibiru.