Remember when there were nine planets? Sadly, for the smallest floating rock of them all, Pluto was demoted to a dwarf planet in 2006 and now, every year on August 24th we celebrate Pluto Demotion day. Joining us from the Toowoomba campus of the University of Southern Queensland is Astrophysics Professor Jonti Horner.

Jack Lewis presents episode one of 'Spaced Out', the new weekly Wednesday afternoon news magazine show from Phoenix Radio. Produced by Patrick Stibbe.