Nibiru¶

Nibiru (Sumerian: Nibiru, "Crossing" or "Planet of the Crossing") is the hypothetical twelfth planet that forms the cornerstone of Zecharia Sitchin's cosmology. According to Sitchin, Nibiru is a large planet with a highly elliptical 3,600-year orbit that brings it into the inner solar system during each "crossing."

The Celestial Nibiru¶

Sitchin's Description¶

Attribute	Detail
Type	Large planet (several times Earth's mass)
Orbit	Highly elliptical, 3,600 Earth years
Aphelion	Far beyond Pluto
Perihelion	Between Mars and Jupiter (the asteroid belt)
Direction	Retrograde (counterclockwise to other planets)
Inhabitants	The Anunnaki
Other Names	Marduk (in Enuma Elish), the Planet of the Crossing

The Sumerian Source¶

Sitchin identified Nibiru from Sumerian astronomical texts and cylinder seals. The term Nibiru in Akkadian means "crossing" or "ford" — the point where a river is crossed. Sitchin used this to mean the "place of crossing" — where Nibiru crosses the paths of the other planets.

"The great planet Nibiru, the star of Marduk, the one who crosses the heavens, who surveys the lands." — From Babylonian astronomical texts

The Enuma Elish¶

In the Enuma Elish, Sitchin identified Nibiru with Marduk, the champion of the gods who defeated Tiamat. The epic describes: - Marduk's creation from the primordial cosmic waters - His selection as champion against Tiamat - His defeat of Tiamat using the "winds" (forces) - His splitting of Tiamat's body to create the heavens and Earth - His establishment of the "station of Nibiru" as the celestial crossing point

Evidence Claimed by Sitchin¶

Sumerian Astronomical Knowledge — The Sumerians depicted all planets known today (including Uranus, Neptune, and Pluto) in correct order
Cylinder Seals — VA/243 (a cylinder seal from Nippur) shows 11 celestial bodies around a large star, which Sitchin interpreted as the Sun surrounded by planets including Nibiru
The Celestial Battle — The asteroid belt is the remains of Tiamat, shattered by Nibiru's gravitational pull
Biblical References — The "wandering star" and "the day of the Lord" as Nibiru's approach

The 3,600-Year Orbit¶

Sitchin derived Nibiru's orbital period from the Sumerian NÉRU — a unit of 3,600 years. Key events in Sitchin's chronology are separated by multiples of 3,600:

Anunnaki arrival on Earth: ~450,000 years ago (125 NÉRU)
Creation of Adamu: ~445,000 years ago
The Great Flood: ~13,000 years ago (just over 3.5 NÉRU)
The Rise of Sumer: ~3,800 BCE (approximately one NÉRU before the present era)

Scientific Status¶

Nibiru as described by Sitchin is not recognized by mainstream astronomy. The hypothetical "Planet Nine" or "Planet X" proposed by astronomers (Batygin & Brown, 2016) is a different concept — a Neptune-sized planet in a distant 10,000–20,000 year orbit. Sitchin's Nibiru would be detectable if it existed, and its 3,600-year orbit would be gravitationally disruptive.

Cuneiform Evidence¶

The term Nibiru (Akkadian: nēberu, "crossing" or "ford") appears in Babylonian astronomical and astrological texts as a celestial body associated with the god Marduk. The term is used in the Enuma Elish to designate Marduk's celestial station.

CDLI Corpus: Nibiru — Browse tablets mentioning Nibiru in the Cuneiform Digital Library Initiative
Key tablet: The Enuma Elish (Tablet VII, CDLI P450752) describes Nibiru as Marduk's star that "crosses the heavens." Babylonian astronomical diaries and the Mul-Apin series also reference Nibiru as a celestial marker.
Tablet of the Enuma Elish, which equates Marduk with the celestial Nibiru. (CDLI P450752)

Sources¶

Sitchin, Z. (1976). The 12^th Planet. Chapters 4-7.
Sitchin, Z. (2007). The End of Days.
Sitchin, Z. (1990). Genesis Revisited.
Batygin, K. & Brown, M. E. (2016). "Evidence for a Distant Giant Planet in the Solar System." The Astronomical Journal.