mirrored file at http://SaturnianCosmology.Org/ 
For complete access to all the files of this collection
	see http://SaturnianCosmology.org/search.php 
==========================================================
atmospheric pressure gradient, not by buoyancy. In fact, the fireball is
denser than the surrounding atmosphere, so its buoyancy is negative and it
is pulled back down by gravity. When the comet deposited its energy in
Jupiter's atmosphere, it created a zone of hot, high-pressure gas along
its trajectory. This channel of pressurized gas exploded because it had to
expand into its lower-pressure surroundings. However, it was more confined
underneath and along the sides by the higher ambient pressure of Jupiter's
atmosphere. The easiest direction for it to accelerate was upward, where
it was unconfined. It was also directed along its axis, because it must
expand further in that direction before its pressure can drop. The result
was that the hot vaporized cometary and atmospheric material was shot
upward as if from a cannon. As it rose, the driving pressure dropped and
it went into a ballistic trajectory (but because it was a gas it was also
expanding and cooling). It went into free fall, and like a fly ball it
reached a maximum height and arched back down. Because of this behavior,
we call it a "ballistic fireball".  (Shoemaker-levy