"Jim Macklin" wrote in message
...
If the core is 1,000 miles in diameter, the forces required
to actually tumble the semi-solid material, overcoming the
friction with mantle and the gyroscopic forces would be so
great that the Earth would not survive. In fact, I have a
theory.

The planet Venus orbits the Sun in the same direction as all
the other planets, but it rotates backward. I think Venus
was a wanderer and struck the Earth, knocking it into the 23
incline, slowing Venus enough to be captured in the Sun
gravity as an orbiting planet and also giving Venus its
backward rotation. This collision also created the Moon.




Interesting theory but would either planet survive such an encounter as
anything more than a asteroid belt?