Quote (chickenblood @ Aug 8 2011 10:09am)
I didn't mean Elenin parsay. I just meant in general most theories about asteroids and comets passing close to earth have some truth behind them.
First of all, I think it's a pretty safe assumption that you have absolutely no scientific background whatsoever
Now that that's out of the way, the gravitational force of an object drops off as a function of the distance between them squared, so if something gets twice as far away, it has 1/4 of the gravitational force. Considering that even the biggest asteroids in the solar system are on the order of a few kilometers in diameter, that asteroid would have to come INCREDIBLY close, and I'm talking inside the Earth's atmosphere, in order to have any gravitational effects like you're describing. And the odds of an asteroid entering our atmosphere without hitting the planet are incredibly, INCREDIBLY small. If something big enough to do that enters our atmosphere, the collision with the planet will be far more disastrous than what you're describing.