suddenly appeared near you?

突然出現在你旁邊

Short answer: you’d die.

最簡單的答案：你會死掉

Long answer: it depends.

講的詳細一點：這要看情況

Is it a black hole with the mass of a coin,

要看是如硬幣重的黑洞

or is it as wide as a coin?

或是如硬幣尺寸的黑洞

Suppose a US nickel with the mass of about 5 grams

假設有一個5公克的鎳幣

magically collapsed into a black hole.

神奇崩塌成一個黑洞

This black hole would have a radius of about 10 to the power of −30 meters.

這個黑洞的半徑將有10的-30次方公尺

By comparison, a hydrogen atom is about 10 to the power of −11 meters.

比較一下，氫原子半徑約為10的-11次方公尺

So the black hole compared to an atom is as small as

所以黑洞比氫原子的大小

an atom compared to the Sun.

就好比氫原子比太陽的大小

Unimaginably small!

小到無法想像!!!

And a small black hole would also have an unimaginably short lifetime

小黑洞也有無法想像的超短壽命

to decay by Hawking radiation.

它會因霍金輻射而消散

It would radiate away what little mass it has in 10 to the power of −23 seconds.

它會在10的-23次方秒內把質量都幅射出去

Its 5 grams of mass will be converted to 450 terajoules of energy,

5公克的質量將轉換成450兆焦耳的能量

which will lead to an explosion roughly 3 times bigger than

導致爆炸程度大約是三倍的

the atomic bombs dropped on Hiroshima and Nagasaki combined.

廣島和長崎核爆能量加起來

In this case, you die.

在這個案例中，你已經死了

You also lose the coin.

你也失去你的硬幣

If the black hole had the diameter of a common coin,

如果這是個有硬幣直徑的黑洞

then it would be considerably more massive.

它將有更大的質量

In fact, a black hole with the diameter of a nickel

事實上，和硬幣一樣直徑的黑洞

would be slightly more massive than the Earth.

其質量比地球還稍稍重一些

It would have a surface gravity a billion billion times greater

它的表面重力，比我們現在的星球還大上

than our planet currently does.

數百個億億倍

Its tidal forces on you would be so strong

它的引力是如此巨大

that they’d rip your individual cells apart.

導致你的每個細胞被撕裂

The black hole would consume you before you even realized what’s happening.

在你還沒意識到前，黑洞就會把你吞噬

Although the laws of gravity are still the same,

雖然萬有引力定律是相同的

the phenomenon of gravity that you’d experience would be very different

但你所體驗到的重力現象將非常不同

around such dense objects.

當處在這樣高密度的物體旁

The range of the gravitational attraction

萬有引力作用的範圍

extends over the entire observable universe,

擴展到整個已知宇宙

with gravity getting weaker the farther away you are from something.

你離某些東西越遠，重力就越弱

On Earth right now, your head and your toes are approximately the same distance

現在，你的頭和腳離地球中心的距離

from the center of our planet.

是大約差不多的

But if you stood on a nickel-sized black hole,

但如果你站在一個硬幣大小的黑洞上

your feet would be hundreds of times closer to the center,

你的腳和其中心的距離會近幾百倍

and the gravitational force would be tens of thousands of times as large

受到的重力也會比頭還大幾萬倍

as the force on your head and rip you into a billion pieces.

然後把你撕成幾十億個碎片

But the black hole wouldn’t stop with just you.

黑洞不會因為你而停止

The black hole is now a dominant gravitational piece

現在黑洞成為主要的重力因子

of the Earth–Moon–Black-Hole-of-Death system.

在地球-月球-死亡黑洞這個系統之間

You might think that the black hole would sink towards the center of the planet

你可能認為黑洞會下沉至星球中心

and consume it from the inside out.

然後將其由內而外的吞噬

In fact, the Earth also moves up onto the black hole and begins to bob around,

事實上，地球也會往黑洞方向移動，並來回擺動著

as if it were orbiting the black hole,

就像地球也在繞著黑洞運行一樣

all while having swathes of mass eaten with each pass,

每個時刻都有一部分的地球被其吞噬

which is much more creepy.

這聽起來有點詭異

As the Earth is eaten up from the inside,

當地球從內部被吞噬

it collapses into a scattered disk of hot rock,

它會崩解分散成為熱岩盤

surrounding the black hole in a tight orbit.

以緊密的軌道環繞著黑洞

The black hole slowly doubles its mass by the time it’s done feeding.

黑洞慢慢吞噬著，最後增加為2倍質量

The Moon’s orbit is now highly elliptical.

月球以楕圓形軌道繞著地球

The effects on the Solar system are awesome—

這樣的影響在太陽系之中是令人敬畏的

in the Biblical sense of awesome, which means terrifying.

如《聖經》般令人敬畏的，即是說可怕的

Tidal forces from the black hole would probably disrupt the near-Earth asteroids,

來自黑洞的引力可能瓦解近地小行星

maybe even parts of the asteroid belt,

甚至部分的小行星帶

sending rocks careening through the Solar system.

使岩塊傾向太陽系

Bombardment and impacts may become commonplace

撞擊可能變得習以為常

for the next few million years.

在接下來數百萬年間持續著

The planets are slightly perturbed, but stay approximately in the same orbit.

星球會有些許的擾亂但大致上在相同的軌道上

The black hole we used to call Earth will now

我們以前稱之為地球的黑洞

continue on orbiting the Sun in the Earth’s place.

將持續地繞著太陽運行

In this case, you also die.

在這個案例中，你一樣會死掉

This bonus video was made possible by your contributions on Patreon.

因為有你對Patreon的贊助，才能製作這個額外的影片

Thank you so much for your support!

非常感謝您的支持

The topic is based on a question on the AskScience subreddit

這個主題是基於AskScience上的一個提問

and the glorious answer by Matt [Caplin?], who also worked with us on this video.

和Matt Caplin在上面引人入勝的回答，他也參與了這部影片

Check out his blog, Quarks and Coffee, for more awesome stuff like this!

去看看他的部落格吧，Quarks and Coffee，那裡有更多精彩的東西

If you want to discuss the video, we have our own subreddit now.

如果你想進一步討論此影片，我們現在也有自己的subreddit了

To learn more about black holes or equally interesting neutron stars, click here.

想知道更多關於黑洞，中子星的事，請點這裡...

Subtitles by the Amara.org community