End of world is not on 2012. But if you are interested on this subject, read the link below

http://www.barry.warmkessel.com/SynopsisComet.html


Comet impacts cause times of great cold, even Ice Ages, because they stir up so much dust. Evidence can be found in "tree ring", "ice core" and other data. Geochronology data shown in the following table indicate that Earth has been hit often recently. Five comet swarms have formed at two distant (444 AU) locations separated by 13o in Vulcan's elliptical orbit. All are formed in a 3:2 resonance orbits during two sequential Vulcan orbital revolutions. These are similar to the red Plutinos found in a 3:2 resonance orbit with Neptune. These Vulcan related swarms are labeled A' & A and B' & B respectively. A rogue swarm C (same period anticipated) is also present. The separation of the A' to A and B to B swarms is found to be about 666 - 790 years. Multiple comet clusters (Cl) within each swarm exist. Images of these clusters have been found carved in solid rock.


"Starting at the end and work forwards, the last Cataclysmic event is when the Earth is renovated by fire. It is discussed in 2 Peter 3:5-13 and Revelation 20:7-15. The Earth is turned into a sea of fire and lava. There are no longer any oceans. This event could be cause by a large impactor 100-200 miles in diameter.

Before that happens there will be a millennium, a thousand years, of peace. Revelation 20:1-6 - God made a promise to the Jewish people, during this time he will begin to fulfill it. Before that there is a Great Tribulation. This event is discussed in Matthew 24:21, Revelation 8:5-13, Revelation 6:12-17, Revelation 16:17-21 and Revelation 18:8-10,21 to name a few. The damage falls in line with the damage that would be created from an impactor in the 2-3 mile diameter range.