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B1 中级 英语 3:54 Educational

Exoplanets 101 | National Geographic

National Geographic · 1,442,099 次观看 · 添加于 2 个月前

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00:00

(dramatic music)

00:03

- [Narrator] They are nestled in the final frontier,

00:06

countless worlds, scattered throughout countless galaxies,

00:11

challenged the notion that we are alone in the universe.

00:20

Exoplanets are worlds that exist

00:22

outside of our solar system.

00:24

Also known as Extrasolar planets,

00:27

these bodies often orbit their own stars,

00:30

with some being a part of entire planetary systems.

00:34

Exoplanets are made of the same elements

00:36

as the world's and our solar system,

00:39

and based on their composition and structures

00:41

are just as diverse.

00:44

Some, known as giant or Neptune-like planets,

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