Nibiru was a Sumerian astronomical term used to describe a planetary body that periodically approached Earth. This account was hijacked by the late Zechariah Sitchin to construct his Planet X theory in which he claimed that this planet had an orbit which took it to the outer limits of the solar system returning every 3600 years to the vicinity of Earth. Sitchin claimed that during one of these visits some of its inhabitants came to earth and become the ‘gods’ of the Sumerians. However, Sitchin failed to explain how the inhabitants of this Planet X survived the lack of heat and light that it would have had to endure as it moved away from the proximity of the Sun. For us inhabitants of Earth a drop of just a few degrees is fatal.
However, Emilio Spedicato has a radically different and certainly more rational view of this Sumerian planet. He ascribes a much shorter orbital period of 20 years to Nibiru and claims that close encounters with this planet (and its satellites) had a dramatic physical effect on the prehistory of our planet including the capturing of our Moon, the destruction of Atlantis and later the biblical Exodus! His scenario has elements that can be traced to Velikovsky, Ackerman and Hörbiger.
Robert Solarion was a keen follower of Immanuel Velikovsky and like him was conviced that in the first and second millennia BC the Earth had suffered a catastrophic Pole Shift as a result of a close flybys of a large extraterrestrial body or bodies. Velikovsky identified these as Venus and Mars, but Solarion differed, suggesting that it was the putative Nibiru!(h)
Professor Spedicato’s November 2012 paper, From Nibiru to Tiamat, an Astronomic Scenario for Earliest Sumerian Cosmology, can be read or downloaded from the excellent Diffusion and Migration website(a). A number of his other papers can be found on the same website and are certainly worth studying.
In sharp contrast to the serious work of Spedicato, for the past couple of years we have been subjected to a barrage of silly articles(b) linking Nibiru with the promised 2012 global catastrophes ‘predicted’ by the Mayan calendar.
A debunking of both Sitchin’s scholarship and the existence of Nibiru has been offered by a number of sites(c).
However, some people, such as David Meade (a pen-name) who describes himself as a ‘Christian numerologist’ predicted that Nibiru would collide with Earth on September 23, 2017! When this did not happen he moved the event to October, but again nothing happened. But he persisted and subsequently moved our demise to March 2018, then April, with a final suggestion for the year of between May and December(d).