In article 6f7gf.1658$8o6.827@trndny03, "Nog"
wrote:

If comets are made from mostly water-ice, some dirt and organic matter they
had to come from a former water planet that blew up somewhere in the
universe.

Er... why? Where do you imagine this water planet came from? Why do
you imagine comets couldn't form in the same way? Finally, what could
possibly "blow up" a water planet and leave fragments of it whizzing
around our solar system?

,------------------------------------------------------------------.
| Joseph J. Strout Check out the Mac Web Directory: |
| http://www.macwebdir.com |
`------------------------------------------------------------------'