Welcome to #PlutoforPlanet. We are happy about everyone who is committed to Pluto. And not just for him, but for countless other comparable celestial bodies that are still waiting to be discovered. Our goal is to rekindle the discussion about planet classification.

On February 18, 2020, Pluto celebrates the 90th anniversary of its discovery by Clyde Tombaugh. For more than 70 years it was considered the ninth planet in our solar system - until the International Astronomical Union (IAU), the World Association of Professional Astronomers, revoked its planetary status in 2006. A very dubious decision, which is not only criticized by the Hamburg Planetarium: After 2006, a heated debate among scientists and laypeople started, which continues to this day. Was the decision made by the IAU simply out of convenience, as one might shy away from an unmanageable increase in many more new planets?

On this page you will find a lot of information about the history of planet discovery, our solar system, Pluto and its dubious classification by the IAU. Inform yourself, discuss with us and vote!

You can get more information about Pluto especially at our shows „Pluto and Planet X“ and „Planeten Tour 3D“.