Expert: Ralph Salier - 10/24/2009

Question
Did pluto leave owr solar system?
why?

Answer
Hi Faizahawat,

No, it did not leave the solar system.  However, at the international astrophysical society convention the delegates determined that Pluto no longer met the criteria for being a planet.  Its size is to small to fit into the planetary major planets.  It has be re-designated as a minor planet.  One reason for this other then size is that it does not have a regular orbit around the sun.