Protoplanet

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A1 初級

n.名詞原行星

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一個星球會不會與地球相撞？ (Could a Planet Ever Collide With Earth?)

03:34

一個星球會不會與地球相撞？ (Could a Planet Ever Collide With Earth?)

It then slammed into our protoplanet and vaporized on impact.
然後它猛烈地撞上我們的原始行星並在碰撞中汽化。

這顆金屬小行星可能揭示地球核心的祕密｜發射倒計時 (This Metal Asteroid Could Reveal Secrets About Earth’s Core | Countdown to Launch)

04:53

這顆金屬小行星可能揭示地球核心的祕密｜發射倒計時 (This Metal Asteroid Could Reveal Secrets About Earth’s Core | Countdown to Launch)

Researchers suspect the asteroid is an exposed core of a protoplanet, which is a planet in

如果外星人生活在地球上怎麼辦？ (What If Aliens are Living Inside Earth?)

05:11

如果外星人生活在地球上怎麼辦？ (What If Aliens are Living Inside Earth?)

Theia, a protoplanet the size of Mars,
Theia，一顆原行星，大小與火星相當。