Name: 如果所有的星星同時爆炸會怎樣？ (What If All Stars Exploded at the Same Time?)
Uploaded: 2021-01-14T10:39:47.000Z
Duration: 4 min 9 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

情態副詞

if all the stars in the Universe exploded

For every galaxy that's visible from Earth,

there are nine smaller ones that we can't see,

even with all the technology we've developed.

in the observable universe that we're missing out on.

We can't even see all the stars in the Milky Way.

Our home galaxy is just too cluttered with gas, dust,

smaller stars and one supermassive black hole.

how many stars there really are out there.

But whatever that number is, it sure has a lot of zeros in it.

might mean that the Earth is about to become

All stars eventually exhaust their nuclear fuel and die.

first swelling to the stage of a red giant

and then slowly cooling down over billions of years.

More massive stars explode into a blinding burst of light,

they spit out a superheated shockwave in all directions,

Supernovas exploding 30 light-years away from Earth,

that it would start ripping apart our ozone layer.

to allow just 10% more UV rays to hit the planet's surface,

nearly all marine life would be wiped out.

people living in mid-latitude cities - from London to Melbourne -

Not even SPF 1000 would save your skin from that much radiation.

From Earth, this would appear as a lot of bright flashes in the sky.

the explosions would happen in slow motion.

You could see one star exploding for over ten years

as the light from it continued to travel towards Earth.

Sound waves need molecules to travel through.

Since space is a vacuum, there'd be no volume,

Our planet's surface would be wiped out and

Any survivors would be forced underground,

watching out for further damage from exploding stars.

But at least life on Earth could have a chance.

Right, we'd be sharing our neighborhood with one exploding star.

all life on Earth would definitely come to an end.

The surface of our planet would become 15 times hotter

That alone would vaporize Earth within a few days.

Lucky for us, the Sun isn't massive enough to go supernova.

But if it exploded, it would send matter in all directions;

raining down on Earth 22 hours after the explosion.

But then, exploding stars might form new stars

It would be the beginning of a new Universe,

possibly with new habitable worlds and new life forms.

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如果所有的星星同時爆炸會怎樣？ (What If All Stars Exploded at the Same Time?)

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massive

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