Defining a planet
Monday, August 21st, 2006Nobody’s asked me yet, but here’s my definition of a planet:
A spherical body orbiting a body of stellar or greater mass, with sufficient mass to prevent any stable, coplanar, non-resonant orbit with a period between 2/3 and 3/2 of its own period.
Point by point:
A spherical body - eliminates black holes, stellar rings and the like.
orbiting […]