維基百科
地球
File:The_Earth_seen_from_Apollo_17.jpg

地球歷史
History of the Earth
Protoplanetary_disk
File:Artist’s_Impression_of_a_Baby_Star_Still_Surrounded_by_a_Protoplanetary_Disc.jpg
File:Protoplanetary disk.jpg
大碰撞說
Giant impact hypothesis
File:Giantimpact.gif
File:Big Slash.gif
地球構造
Structure of the Earth
File:Earth-crust-cutaway-zh.svg
https://upload.wikimedia.org/wikipedia/commons/9/96/Earth-crust-cutaway-zh.svg