What if Jupiter and Saturn screwed around with Uranus?

On 9/20/2010 3:01 AM, Scott M. Kozel wrote:
"Val wrote:

If Neptune was inside of Jupiter's orbit originally, it should have had

some interesting interactions with the asteroid belt.

Unless the asteroid belt was made later out of some other collision(s)

Remains of Alderaan ?

The name Krypton has also been suggested for a exploded planet that
formed the asteroid belt.
In the Japanese movie "The Mysterians", it was called "Mysteroid". and
if you start figuring out where Klaatu came from in the original "The
Day The Earth Stood Still" based on his statement that he traveled
"about 250 million of your miles." to reach Earth, he also came from
inside the asteroid belt area.
One thing that's always fascinated me are the nickel-iron meteorites,
which seem to resemble solidified fragments of an object that once had a
molten nickel-iron core like a planetary body of some good size would
have had. Mars had one of these, but apparently our Moon never developed
one after it was created in the ancient collision that created our
present Earth, and threw all the upper crust materials into orbit, where
they reformed into the Moon.
That's why Ceres and Vesta interest me; they are spherical in form, but
is that due to gravity, or did they once have a molten phase in their
formation where a nickel-iron core would have been formed inside of them?

Pat