NASA is trying to dispel some rumours that have been going around surrounding the new doomsday movie "2012". The plot involves the end of the world based on theories backed by the end of the Mayan calendar.

NASA has devoted a page on its website to tell movie viewers nothing bad is going to happen to Earth on December 21, 2012. It says the science behind the end of the world quickly unravels when pinned down to the 2012 timeline.

The Mayan calendar theory includes a claim that the end of time will come as an obscure planet collides with Earth. NASA says if this collision was going to happen, it would be seen by the naked eye by now.

The folks at NASA say impressive special effects aside, December 21, 2012, won't be the end of the world as we know it. "2012" opened in theatres Friday.