So how did the prediction that the world will end on December 21, 2012 start.
Also known as the 2012 phenomenon which together comprise of a range of beliefs according to which cataclysmic events will occur on 21.12.2012 and which will transform the world and bring about doomsday. The whole thing started with claims that the planet Niberu, discovered by the Sumerians is header towards earth.
So will the world end on 12/21/2012
NASA astrobiologist David Morrison has taken it upon himself to answer all these questions.NASA have released a separate and independent page called 'Ask an Astrobiologist' and David Morrison personally looks after all the answers. The page goes into detail about how the whole Doomsday 2012 actually started and wheather we are in any actual danger.
The NASA page says there is no danger and Dec 21, 2012 will pass like any other normal day. There are no signs in the cosmos or known universe that revel any kind of doomsday event. In fact thye go on to claim that photos and videos of Niberu found on the internet are false. Poeple who believe in Niberu say it is hiding behind the sun. The NASA scientist however says that these are false images of the sun caused by internal reflections.
Source: Here is the Wikipedia article on Doomsday 2012 phenomenon and here is the link to 'Ask A Astrobiologist' -- NASA's answers to all your Doomsday 2012 questions. A blog entry by the US Govt debunking the theory. Image via MayanCalendars.
Here is a video by NASA Astrobiologist David Morrison answering questions 'The Truth About 2012'
http://youtu.be/LG2B9YZjr7w