It happens on December 21st 2012 at 11am GMT
it will be destroyed, considering Earth is a planet.
Every one will die from asteroids.
Both planets would be destroyed, as the gravitational pull would rip off matter from both planets, and they would be ripped apart.
The earth is a planet, it has no known planets within.
They are famous for happening on Mars but also occur on some planets and moons.
It would engulf the sun and most of the planets.
There are no planets orbiting Earth.
(well in pics) but it really wont happen because earth is like a big magnet but the gravitational pull will not let the other planets collide with the earth or (even the sun) some say !!
All the planets would go out of their orbits and the Sun wouldn't warm the Earth, therefore erasing all life on Earth.
They may happen to cross Earth's orbit, and just crash into it. The gravity of the planets can also help increase the likelihood of a collision.
The earth would only rotate the sun because the sun is a star so only stars and meteors would be left.
A star can have planets, those planets can have moons: that's the heirarchy. Actually Betelgeuse is a red giant, which means that any planets it might have had are likely to have been swallowed up as the star expanded, which is what will happen to the Earth when the Sun swells up. But it won't happen for the next few billion years.