Pluto used to be a full-fledged planet, then it was not in 2006. But the debate about its status continues and you can watch each discussion alive today.
2006 Decision of the International Astronomical Union demoted Pluto to "small planet" is central to the debate at 8 pm EDT (0000 GMT 30 April) in Washington Philosophical Society in Washington, DC You can watch live hereIn the above, or directly from the group PSW science here.
Alan Stern, principal investigator for the mission New Horizons, which flew by Pluto in 2015, with the & # 39 is a staunch supporter of Pluto is the rest of the planetHe will fight with Ron Ekers, past president of the International Astronomical Union (IAU), who led the organization from 2003 to 2006, when there was a reduction of Pluto. IAU with & # 39; is the international body that regulates the name of heaven & # 39 objects.
Stern will discuss what he sees as the scientific issues related to the definition of the term "planet" and he proposes a new definition, which is more inclusive of small bodies, such as Pluto. Ekers will act in favor of the determination of the IAU, which has a clear Systematics for small worlds that are far in the solar system in a region known as the Kuiper Belt.
The push to give back planethood accelerated after Pluto New Horizons flyby on & # 39 object, which showed that Pluto had a hill, wide sea, and other advanced features. Stern argues that its geology is more like a planet than a smaller world of geology.