（太陽系）遠得要命的FarFarOut小天體

今年2月10日，科學家宣布發現一顆太陽系最遙遠天體FarFarOut。在此之前，是2018年發現一顆名為FarOut的小行星居於太陽系最遙遠之首。尋找太陽系最遙遠的星體，有什麼重要意義？ FarFarOut距離太陽最遠時是175AU，那是多遠的距離？它抵達太陽系的邊緣嗎？太陽系邊緣在哪裡？（太陽系狹義和廣義的邊界） FarFarOut的大小約在矮行星下限，怎麼定義矮行星？目前矮行星有幾顆？

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（太陽系）遠得要命的FarFarOut小天體

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