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B1 中級 英語 7:10 Educational

The Most Dangerous Stuff in the Universe - Strange Stars Explained

Kurzgesagt · 23,653,723 回視聴 · 追加日 3週間前

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B1

CEFRレベル

5/10

難易度

字幕 (113 セグメント)

00:00

Neutron stars are the densest things that are not black holes.

00:05

In their cores, we might find the most dangerous substance in existence:

00:10

Strange matter.

00:11

A bizarre thing so extreme,

00:14

that it bends the rules of the universe

00:16

and could infect and destroy everything it comes into contact with--

00:20

--or it could teach us about how the universe began.

00:24

Maybe both.

00:29

[Intro music]

00:36

To understand how extreme strange matter really is, we first need to get a few basics.

00:41

What is a neutron star, and how does strange matter break the rules of the universe?

00:47

To get all of this into one video, we'll grossly oversimplify a few things,

00:51

but we'll provide you with further reading if you want more details.

00:55

A neutron star is what remains after a very massive star explodes in a supernova.

01:01

When this happens, the star's core collapses under its own gravity

01:05

with such a strong inward force that it squeezes nuclei and particles together violently.

01:10

Electrons are pushed into protons, so they merge and turn into neutrons.

01:15

All the "nothing" inside of atoms is suddenly completely filled with particles

01:19

that really don't want to be close to each other, but have no choice.

01:23

They desperately push back against gravity, against the collapse.

01:27

If gravity wins, they will become a black hole.

01:30

If they win, they become a neutron star.

01:34

This makes neutron stars like giant atomic nuclei the size of a city,

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