- 问题详情:Theworld’sastronomerscametotheirsensesyesterdayandapprovedanewdefinitionoftheword“planet”thatwoulddroptinyPlutofromtheclubandrelegateitinsteadtoalesserrealmof“dwarfplanets.”ItwasawelcomestepawayfromaproposalthatwouldhavekeptPlutoasaplane...
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