[extropy-chat] SPACE: How many planets?

[Robert J. Bradbury]

Space Daily has an interesting article this morning on how
to settle the is it or isn't it a planet debate (I'll spoil
the article to some extent by providing a summary -- if it
has enough gravity to round itself but not enough to start
nuclear fusion its a planet).

But its a really interesting article in with respect to
both the physics and how one deals with young children
who may have different opinions:

URL:
  http://www.spacedaily.com/news/outerplanets-04b.html

R.