The Nibiru cataclysm is a supposed disastrous encounter between Earth and a large planetary object (either a collision or a near-miss) that certain groups believed would take place in the early 21st century. Believers in this doomsday event usually refer to this object as Nibiru or Planet X. The idea was first put forward in 1995 by Nancy Lieder, founder of the website ZetaTalk. Lieder claims she is a contactee with the ability to receive messages from extraterrestrials from the Zeta Reticuli star system through an implant in her brain. She states that she was chosen to warn mankind that the object would sweep through the inner Solar System in May 2003 (though that date was later postponed) causing Earth to undergo a physical pole shift that would destroy most of humanity. The prediction has subsequently spread beyond Lieder's website and has been embraced by numerous Internet doomsday groups. In the late 2000s, it became closely associated with the 2012 phenomenon. Since 2012, the Nibiru cataclysm has frequently reappeared in the popular media, usually linked to newsmaking astronomical objects such as Comet ISON or Planet Nine. Although the name "Nibiru" is derived from the works of the "ancient astronaut" writer Zecharia Sitchin and his interpretations of Babylonian and Sumerian mythology, he denied any connection between his work and various claims of a coming apocalypse. A prediction by self-described "Christian numerologist" David Meade that the Nibiru cataclysm would occur on 23 September 2017 received extensive media coverage. The idea that a planet-sized object will collide with or closely pass by Earth in the near future is not supported by any scientific evidence and has been rejected by astronomers and planetary scientists as pseudoscience and an Internet hoax. Such an object would have destabilised the orbits of the planets to the extent that their effects would be easily observable today. Astronomers have hypothesized many planets beyond Neptune, and though many have been disproved, there are some that remain possible, such as Planet Nine. All the current hypotheses describe planets in orbits that would keep them well beyond Neptune throughout their orbit, even when they were closest to the Sun.
History
Nancy Lieder and ZetaTalk
The idea of the Nibiru encounter originated with Nancy Lieder, a Wisconsin woman who claims that as a girl she was contacted by gray extraterrestrials called Zetans, who implanted a communications device in her brain. In 1995, she founded the website ZetaTalk to disseminate her ideas. Lieder first came to public attention on Internet newsgroups during the build-up to Comet Hale–Bopp's 1997 perihelion (the closest approach to the Sun). She stated, claiming to speak as the Zetans, that: "The Hale–Bopp comet does not exist. It is a fraud, perpetrated by those who would have the teeming masses quiescent until it is too late. Hale–Bopp is nothing more than a distant star, and will draw no closer." She claimed that the Hale–Bopp story was manufactured to distract people from the imminent arrival of a large planetary object, "Planet X", which would soon pass by Earth and destroy civilization. After Hale–Bopp's perihelion revealed it as one of the brightest and longest-observed comets of the last century, Lieder removed the first two sentences of her initial statement from her site, though they can still be found in Google's archives. Her claims eventually made the New York Times. Lieder described Planet X as roughly four times the size of Earth, and said that its closest approach would occur on May 27, 2003, resulting in Earth's rotation ceasing for exactly 5.9 terrestrial days. This would be followed by Earth's pole destabilising in a pole shift caused by magnetic attraction between Earth's core and the magnetism of the passing planet. This in turn would disrupt Earth's magnetic core and lead to subsequent displacement of Earth's crust. After the 2003 date passed without incident, Lieder said that it was merely a "white lie ... to fool the establishment". She refused to disclose the true date, saying that to do so would give those in power enough time to declare martial law and trap people in cities during the shift, leading to their deaths.
Zecharia Sitchin and Sumer
Although Lieder originally referred to the object as "Planet X", it has become deeply associated with Nibiru, a planet from the works of ancient astronaut proponent Zecharia Sitchin, particularly his book The 12th Planet. According to Sitchin's interpretation of ancient Mesopotamian religious texts, which has been shown to be based on a faulty understanding of Sumerian text, a giant planet (called Nibiru or Marduk) passes by Earth every 3,600 years, allowing its sentient inhabitants to interact with humanity. Sitchin identified these beings with the Anunnaki in Sumerian mythology and claimed that they were humanity's first gods. Lieder first made the connection between Nibiru and Planet X on her site in 1996 ("Planet X does exist, and it is the 12th Planet, one and the same"). Sitchin, who died in 2010, denied any connection between his work and Lieder's claims. In 2007, partly in response to Lieder's proclamations, Sitchin published a book, The End of Days, which set the time for the last passing of Nibiru by Earth at 556 BC, which would mean, given the object's supposed 3,600-year orbit, that it would return sometime around AD 2900. He did say that he believed that the Annunaki might return earlier by spaceship, and that the timing of their return would coincide with the shift from the astrological Age of Pisces to the Age of Aquarius, sometime between 2090 and 2370. Modern proponents of the Nibiru cataclysm often cite the winged sun symbol as actually representing Nibiru, whom they believe would appear like a "winged star".
2012 and the Mayan calendar
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![Nibiru cataclysm: The "Winged Sun of Thebes", from Egyptian Mythology and Egyptian Christianity written by Samuel Sharpe in 1863. Proponents of the Nibiru cataclysm have often cited this as an ancient representation of Nibiru.[14]](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Winged_sun_sharpe.png/500px-Winged_sun_sharpe.png?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail)
![Nibiru cataclysm: David Meade believed that Nibiru's arrival on September 23, 2017, was tied to an astrological reading of the Woman of the Apocalypse.[27][28]](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Statue_of_Virgin_Mary_in_the_Cathedral_of_Strasbourg.jpg/1280px-Statue_of_Virgin_Mary_in_the_Cathedral_of_Strasbourg.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail)

