In a previous post I discussed the possibility that Pluto's status as planet might be rescinded due to the recent discovery of a larger celestial body.
The Economist writes:
On Thursday August 24th a general assembly of the International Astronomical Union, the body with the authority to decide such matters, voted to remove Pluto from the list of planets. Predictably some astronomers are angry and have criticised the system for making such choices. There were certainly problems with the voting. Nevertheless the decision was right.I totally agree. It does not matter what has been historically taught. Sometimes you need to ask fundamental questions based on new information and alter long-held views.
Changing our views is what learning is all about.