The rumors about 2012 are spreading over the world. Ancient civilizations and religions are giving sign about 2012. Scientists and Astronomers are working for it to reveal the true story. They are thinking that a huge catastrophic disaster will take place in Earth just like a super climate disaster happened about 6500 millions years ago in Dinosaur's era. It will be a big threat to surviving human-kinds in this planet.

In couple of years ago a group of scientist discovered that a planet called X is coming toward the Earth. It's orbiting around our solar system. In 2012 21th December the planet will impact in Earth (Theoretical). Some scientists are also thinking that a planet called Eris and Nibiru can be impact.

In the picture Planet X is orbiting in the outer space of our solar system. Then it will pass through the Asteroids belt between Mars and Jupiter. As a result Asteroids impact will be held and may also cause Solar storm and massive Gravitational reaction. But scientists are not sure about the existing of planet X.
So all of these may not happen if the planet is not really existed.

Let check it out in Ancient civilizations theory 


The 2012 phenomenon comprises a range of eschatological beliefs that cataclysmic or transformative events will occur on December 21, 2012. This date is regarded as the end-date of a 5,125-year-long cycle in the Mesoamerican Long Count calendar. Various astronomical alignments and numerological formulae related to this date have been proposed. A New Age interpretation of this transition postulates that this date marks the start of time in which Earth and its inhabitants may undergo a positive physical or spiritual transformation, and that 2012 may mark the beginning of a new era. Others suggest that the 2012 date marks the end of the world or a similar catastrophe. Scenarios suggested for the end of the world include the arrival of the next solar maximum, or Earth's collision with a black hole or a passing planet called "Nibiru".
Scholars from various disciplines have dismissed the idea of such cataclysmic events occurring in 2012. Mainstream Mayanist scholars state that predictions of impending doom are not found in any of the extant classic Maya accounts, and that the idea that the Long Count calendar "ends" in 2012 misrepresents Maya history. The modern Maya do not consider the date significant, and the classical sources on the subject are scarce and contradictory. Astronomers and other scientists have rejected the apocalyptic forecasts as pseudoscience, stating that the anticipated events are contradicted by simple astronomical observations


This culture predicts his own date for the next passage of Nibiru in the year 2085, but the date most talked about is 2012 which marks the end of the Maya calendar.
Nibiru (the planet associated with Marduk in Babylonian cosmology) is a central element of Sitchin's theory. He claims it was a tenth planet (twelfth to those who included the Sun and Moon) which followed a long, elliptical orbit, reaching the inner solar system every 3600 years. According to his theories of Sumerian cosmology, Nibiru was the twelfth member in the solar system family of planets (which includes 10 planets, the Sun, and the Moon). Its catastrophic collision with Tiamat, a planet that was between Mars and Jupiter, would have formed the planet Earth and the asteroid belt and comets.

However, a brown dwarf with a period of 3,760 years would be clearly evident through infrared and gravitational observations. In a recently published book, titled 2012: Appointment With Marduk, Turkish writer/researcher Burak Eldem presents a new theory, suggesting a 3,661 years orbital period for the planet and claiming a "return date" in the year 2012 AD. According to Eldem's theory, 3,661 is one-seventh of 25,627, which is the total time span of "5 World Ages" according to Maya.

For more information visit - http://www.nasa.gov/topics/earth/features/2012.html