EPISODE · Nov 20, 2021 · 25 MIN
哈佛大學天文學家認為恐龍滅絕禍首是～彗星（上）
from 吳老師與Maggie聊天文與生活 · host Maggie K
1・哈佛天文學家與合作團隊，為何認為是彗星撞地球造成恐龍滅絕？所持的理論和證據。 2・何謂歐特彗星雲，認識太陽系的狹義與廣義邊界。 3・什麼是掠日彗星，造成遙遠彗星靠近太陽的主要原因，撞擊地球的可能頻率。 4・何謂碳質球粒隕石。 5・認識短週期和長週期彗星。 6・如何初略判斷一顆石頭有可能是隕石。
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哈佛大學天文學家認為恐龍滅絕禍首是～彗星（上）
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