In a message dated 97-07-30 14:20:17 EDT, you write: << Although still strange today, with the recent work of Louis Frank et al at Iowa on mini-comets it seems very plausable. Remember the ice Frank talks about has no dust or gas; so would be from a comet with no coma or tail. Almost invisible in fact. >> Theres an article on Frank's work in the Sept. issue of either S&T or Astronomy - good reading and images. Kevin