More then 8, or No less than 10 (Score 1)

The nine planet system was doomed after 2003 UB313 was discovered and found to be larger Pluto. So if UB313 is not a planet then Pluto cannot still be a planet. However, if Pluto is a planet then surely 2003 UB313 is a planet as well. What seems to have complicated the debate is that some astronomers vehemently want to demote totally as a planet; for them even 'dwarf planet' status doesn't go far enough. On the other hand there are other people who just a vehemently want to keep Pluto as planet.

I doubt this IAU meeting will be the final word on the question in the long run.