View Single Post
  #4  
Old August 26th 06, 10:43 AM posted to sci.astro.amateur
Paul Schlyter[_2_]
external usenet poster
 
Posts: 893
Default Of Stars, Pluto and Planetary Classification

In article ,
Willie R. Meghar wrote:

(Paul Schlyter) wrote:

That's nothing new! Consider Titan, which is bigger and more massive
than Mercury and has an atmosphere as dense as the Earth's atmosphere.
Yet, it's not a planet, because of its orbital characteristics: it
orbits Saturn, not the Sun.

Based solely of the physical nature of the object itself, Titan would
be an obvious planet. Right?


Right, unless the limiting mass for a planet is reduced to a level
that would exclude Titan, in which case Mercury would not be a planet
either.

Willie R. Meghar


I think you mean "increased" rather than "reduced"..... :-)

Anyway, no-one has seriously suggested THAT - right?

--
----------------------------------------------------------------
Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN
e-mail: pausch at stockholm dot bostream dot se
WWW: http://stjarnhimlen.se/