Re: Rocket Launch Tuesday?
Sat, 26 Dec 1998 14:19:16 EST

In a message dated 12/25/98 2:44:39 PM Central Standard Time,
lisansky@UDel.Edu writes:

<< 	It couldn't have been a contrail, because it only lasted a few
 seconds and disappeared, like a rocket motor cutting off.  But it did have
 that look of a pulse type engine.  Thanks.....Terry
Terry Lisansky >>

Contrails form under conditions which can be rather localized.  If a jet
passes through a change in temperature, or humidity, the contrail can end
rather abruptly.