太阳系十二大行星

今天看到一则新闻，国际天文组织今早公布行星新定义的提议："
A planet is a celestial body that (a) has sufficient mass for its
self-gravity to overcome rigid body forces so that it assumes a
hydrostatic equilibrium (nearly round) shape, and (b) is in orbit
around a star, and is neither a star nor a satellite of a planet."



如果新定义的提议下周被通过了，到时太阳系除了已有老资格的九大行星外，可能迎来Pluto-Charon，Ceres，Xena这三个新成员。是舒服的沿用已有定义系统？还是接受科学新进展？呵呵，估计争议会不小。