冥王星從九大行星裏除名
在捷克召開的國際天文學會,天文學家在星期四投票決定將Pluto從九大行星裏除名,重新被定義為dawrf planet大新聞。
Pluto被除名的主要原因在於國際天文學會新採納了一個行星的定義,該行星必須是主宰該區域的主要星體,才能被定義為太陽系裏的主要行星。
有些天文學家對這個決定頗為失望,甚至認為這是語言學上的災難:
"We now have dwarf planets which are in fact not planets. I consider this a linguistic catastrophe. I think the union is going to get a lot of flak for this, in doing it in such a muddy way," said Owen Gingerich, chairman of the IAU's official planet definition committee.
不管如何,大家的地球課本內容就是要改寫了。 Link: Astronomers expel Pluto from the planetary club
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