"Here's the official new definition:Hmmm, still say that Pluto is a planet ... calling it a 'Plutoid' is too close to 'asteroid' which is just a fancy name for 'rock'.
'Plutoids are celestial bodies in orbit around the sun at a distance greater than that of Neptune that have sufficient mass for their self-gravity to overcome rigid body forces so that they assume a hydrostatic equilibrium (near-spherical) shape, and that have not cleared the neighborhood around their orbit.'
In short: small round things beyond Neptune that orbit the sun and have lots of rocky neighbors.
The two known and named plutoids are Pluto and Eris, the IAU stated. The organization expects more plutoids will be found."
Notice that there is no mention of Charon, Pluto's orbit mate. Eris is the official name for 'Xena', the temp name given to the next body outside the now 8 planet (it would have been number 11, if you count Charon-Pluto as a binary planet system).
No comments:
Post a Comment