Back in the good old days everyone knew how many planets there were, then scientists came along and screwed everything up. How could something that was always a planet suddenly not be one? It made no sense. Chaos ensued, people protested, and scientists were thrown in prison.I'm not making up that prison part, either.
It was dangerous being one of the first scientists to go against the traditional view of what was and was not a planet. But, regardless of the danger, 467 years ago, Copernicus stood firm. "The Sun and the Moon are not planets", he declared. Two of the seven known planets gone like that.
To read the full, original article click on this link: Mike Brown's Planets: The seven planets
