Do some simulations with Starry night, Celestia, or Nasa'a eyes....The second two are free. The Earth is destined to go through the tail of the comet....just run the simulations...you can add the comet if it is not already in the software...they all show the same scenario. I am a huge Bible believer as well as a mad scientist ..and I have been getting confirmation on a whole bunch of stuff that matches that of this comet. If you do not know what confirmation is, it is when you pray about something and then God confirms His answers through things in the 'real world' ....it is difficult to explain if you do not know about God or the Bible. (not saying you do not) ...anyhow, just keep an eye out on this. Do some research on the internet and youtube...there are plenty of things on this comet...or some call it Nibiru...or planet-x. I have been doing gravity simulations since I got my first computer - Commodore 64, back in 1981 ...so I am very familiar and aware of the effects that one body in motion has on another body in motion...on October 1, 2013 this comet flys right by the planet Mars....if it effects the orbit of Mars...that could be enough to throw off our whole solar system....do some research on your own....download a copy of Celestia or just use the following link to Nasas own comet software. By the way....the return of Jesus matches perfectly with the scenario of a comet....Here are a few verses about Jesus return to Earth...
Luke 21:25-28
There will be signs in the sun, moon and stars. On the earth, nations will be in anguish and perplexity at the roaring and tossing of the sea. Men will faint from terror, apprehensive of what is coming on the world, for the heavenly bodies will be shaken. At that time they will see the Son of Man coming in a cloud with power and great glory. When these things begin to take place, stand up and lift your heads, because your redemption is drawing near.
Matthew 24:27
For as lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man.
Psalm 11:5-7
The Lord examines both the righteous and the wicked.
He hates those who love violence.
He will rain down blazing coals and burning sulfur on the wicked,
punishing them with scorching winds.
For the righteous Lord loves justice.
The virtuous will see his face.
Isaiah 66:15
See, the Lord is coming with fire,
and his swift chariots roar like a whirlwind.
He will bring punishment with the fury of his anger
and the flaming fire of his hot rebuke.
...alls I can say is BE READY! because no man knows the day nor hour!
God Bless
http://eyes.nasa.gov/