[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Dinosaurs in space?



deep-fried...

An event 67 million years in the making!
Come see Dino Summer, featuring A T. Rex Named SUE

GroupWise powered by Time-Warner Road Runner

Sally Pfeiffer
Gallery 2/Space VTL
x2419

>>> christopher robert noto <crnoto@midway.uchicago.edu> 05/17/01 05:01PM >>>

Does that mean we have a ring of "paleobits" circling the sun?
:)
chris


On Thu, 17 May 2001, James R. Cunningham wrote:

> Ken, taking the average velocity of earth ejecta from multiple impacts as a
> whole, the average velocity with respect to the sun would converge on the
> orbital velocity of the earth itself, so on the whole there would be no
> gravitational trend driving the ejecta sunward.  Taking average ejecta 
> velocity
> of  a single event, the velocity with respect to the sun will depend on 
> whether
> the material is kicked out in the direction of the earth's orbital velocity,
> adverse to it, or in some other direction.  To reach the sun itself, the 
> ejecta
> would need to be kicked out retrograde at a velocity of at least 18.5
> miles/second, but not much more than that.
> 
> Jim
> 
> Ken Kinman wrote:
> 
> > Gravity tends to pull most
> > debris toward the center of the solar system, so finding Mars rocks on Earth
> > is more likely than finding Earth rocks on Mars (the escape velocity factor
> > you mentioned would enhance this tendency further).
> 
>