(Image: W W Norton & Co
IN LATE 2006, received an angry letter: “Dear Mr Tyson… Why do you think Pluto is no longer a planet? I do not like your anser[sic]!!! … Pluto is a planet !!!!!!!” signed, “your friend Emerson York”. It was one of a stack of cute hate mail from third-grade students in Pennsylvania.
Read some of the letters complaining about Pluto’s demotion
The letters were prompted by the controversial new definition adopted by the that year, which required a planet to have “cleared the neighbourhood around its orbit” in addition…
