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Re: Bernd: Meteor May Not Have Destroyed Dinosaurs Afterall?

In a message dated 99-10-06 10:42:34 EDT, you write:

 Impact debris from Comet Shoemaker-Levy 9 on Jupiter was still visible
 in Jupiter's upper atmopshere a year after the impact.   The particles
 were visible from Earth (~450 million miles away) on a planet with
 many times more gravity than Earth.   If particles can stay in the
 atmosphere of a giant planet for a year, I don't see why particles
 can't stay suspended for years in the atmosphere of a much smaller planet.

Ron, what other choice do the particles have in staying suspended in the 
atmosphere of a gas giant like jupiter? There's no ground to settle out onto. 
 Perhaps the finer particles in Jupiters upper reaches of it's atmosphere is 
preserved because jupiters gravity is too strong to allow these particles to 
dissipate into space any quicker?

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