One of the tasks at my old job was answering astronomy questions that were sent in to the observatory. This included real questions that covered everything from the annual Mars Hoax to detailed questions about telescopes, eclipses and more.
Over the last several years included in the questions were ones about the end of the world, 2012, "Planet X" (aka Nibiru, Eris), the "alignment" with the galactic center and others - none of which are real. It is unfortunate that so many people have been taken in by the 2012 end of the world hoax.
Since I moved on to another position, I no longer get those questions, but it is still important for the truth to be circulated and this video explains it all very nicely.
Check out the script here and be sure to see the Top 10 Reasons Why the World Won't End in 2012. Help spread the truth and stop the insanity.