What would happen to you if
a black hole the size of a coin suddenly appeared near you? Short answer: you’d die. Long answer: it depends. Is it a black hole with
the mass of a coin, or is it as wide as a coin? Suppose a US nickel with
the mass of about 5 grams magically collapsed into a black hole. This black hole would have a radius
of about 10 to the power of −30 meters. By comparison, a hydrogen atom is about
10 to the power of −11 meters. So the black hole compared
to an atom is as small as an atom compared to the Sun. Unimaginably small! And a small black hole would also have
an unimaginably short lifetime to decay by Hawking radiation. It would radiate away what little mass it
has in 10 to the power of −23 seconds. Its 5 grams of mass will be converted
to 450 terajoules of energy, which will lead to an explosion
roughly 3 times bigger than the atomic bombs dropped on
Hiroshima and Nagasaki combined. In this case, you die. You also lose the coin. If the black hole had the
diameter of a common coin, then it would be considerably
more massive. In fact, a black hole with
the diameter of a nickel would be slightly more
massive than the Earth. It would have a surface gravity
a billion billion times greater than our planet currently does. Its tidal forces on you would be so strong that they’d rip your
individual cells apart. The black hole would consume you before
you even realized what’s happening. Although the laws of gravity
are still the same, the phenomenon of gravity that you’d
experience would be very different around such dense objects. The range of the gravitational attraction extends over the entire
observable universe, with gravity getting weaker the farther
away you are from something. On Earth right now, your head and your
toes are approximately the same distance from the center of our planet. But if you stood on
a nickel-sized black hole, your feet would be hundreds
of times closer to the center, and the gravitational force would be
tens of thousands of times as large as the force on your head and
rip you into a billion pieces. But the black hole wouldn’t
stop with just you. The black hole is now a
dominant gravitational piece of the
Earth–Moon–Black-Hole-of-Death system. You might think that the black hole would
sink towards the center of the planet and consume it from the inside out. In fact, the Earth also moves up onto
the black hole and begins to bob around, as if it were orbiting the black hole, all while having swathes of
mass eaten with each pass, which is much more creepy. As the Earth is eaten up from the inside, it collapses into a
scattered disk of hot rock, surrounding the black hole
in a tight orbit. The black hole slowly doubles its mass
by the time it’s done feeding. The Moon’s orbit is now highly elliptical. The effects on the Solar system
are awesome— in the Biblical sense of awesome,
which means terrifying. Tidal forces from the black hole would
probably disrupt the near-Earth asteroids, maybe even parts of the asteroid belt, sending rocks careening
through the Solar system. Bombardment and impacts
may become commonplace for the next few million years. The planets are slightly perturbed, but
stay approximately in the same orbit. The black hole we used
to call Earth will now continue on orbiting
the Sun in the Earth’s place. In this case, you also die. This bonus video was made possible
by your contributions on Patreon. Thank you so much for your support! The topic is based on a question on
who also worked with us on this video. Check out his blog, Quarks and Coffee,
for more awesome stuff like this! If you want to discuss the video,

## Only registered users can comment.

1. Kurzgesagt – In a Nutshell says:

There's brand new stuff in the Kurzgesagt Merch Shop. Check it out here: shop.kurzgesagt.org

2. Roman O says:

So…BH = always death

3. red Bird says:

2:49 TIME MACHINE

4. MrCrossBone Gt says:

I scared to Kaaaaa……meeeeee

5. falco830 says:

Still not more terrifying as yee mums black hole

IF COLD BLACK HOLE ARE SAFETY BUT IF HOT BLACK HOLE ARE DANGEROUS BECAUSE YO WILL BE BURN, EYES OF THE LIFE HAVE A BLACK HOLE IN THE INSIDE CAME FROM THE GENE,, MAGNET ARE BLACK HOLE AND METAL ALSO THR ROCK ARE BLACK HOLE AND DUST OR SOIL

7. Xalasmeno Bot says:

So fortnite was wrong

8. Visaural says:

Someone copied this video.

9. John churay 2 says:

lol aat 2:49 you can see the tardis from doctor who

10. Laughed A says:

We would die

how big would an explosion be if the black hole at the centre of the milky way galaxy evaporated and exploded.

12. Ott Einassoo says:

i dont have it but Matt Stonie has a universe sised black hole in hes belly

13. Shotoid says:

So Sigma from OW is just a walking talking doomsday?

14. zachary grolla says:

What pocket?

15. XP Archive says:

2:49–2:52 blue payphone

16. Greg Leblanc says:

Theoretically Can you touch a micro blackhole?

17. FirstName LastName says:

blyat i almost stood on a black hole again

18. Noob Gaming says:

DID YOU SEE DR WHO? LOL
I SEE HIM LOL

19. Cypress Playz says:

“Don’t try to stand on a black hole”

How am I going to go on my morning walk now!

Okay, we get it, don't try this at home….
chattering teeth

21. Cj Ceniza says:

Hmm…

Is there a tiny star?!

22. GiriAnkTej AnkTej says:

In short: You'd die.
In detail: You die painfully.

23. GiriAnkTej AnkTej says:

Kurzgesagt – insert "101 ways to destroy the world" in a nutshell

24. Ayberk Kuruçay says:

Long answer : You would die

25. Desi Thug says:

That's what a nickel can do

26. Mystery M says:

So… i am not an.. English native, i am actually Brazilian (Portuguese language) and i have no idea how to pronounce "kurz..ge..gagsta?" Can you help me?

27. *Wonka* says:

I'd name it "taxes"

28. GelatoCrew says:

2:40

29. Graham Vanderhoek says:

2:50 telephone

30. Jimbo Mack says:

what does not to scale mean?

31. SKEler Mattison says:

Who else hates when you're walking to work and you accidently step on a black hole

32. GD KeashUS says:

Title: What if there was a black hole in your pocket?
Viewer: It cou-
Kurzgesagt: You’d die

33. Ashra Abdullah says:

Wait is behind a black hole

34. Aaly Potatoe says:

One day I dropped my purple comb brush behind my bed, And I’m not even kidding it disappeared, I search EVERYWHERE and I still didn’t find it, I think a wormhole sucked it in!! When I grow up I’ll be study astrology and I WILL find out what happened to me purple comb brush!

35. Dankless Horseman69 says:

Short story: you'd die
Long story: you'd die

36. TOMO says:

Would light be able to bounce off such a small gravity black hole? I mean the wide one but now I think the other black hole too but it's way too small

37. Cikita Bannanna says:

but the doctor survived

38. Frost says:

WRONG in steins; gate Okabe managed to create a micro blackhole to send messages back in time xd

ANIME REFRENCE ITS A JOKE!!!

39. Alfa&Omega 00000 says:

The black hole would orbiting the sun? Meaning,it would be more massive than Earth,but not more massive of the Sun,right?

Not the coin!

41. Aydan says:

Did YoU fInD tHe EasteR EgG tip: in the astroids blue

42. I'mPimEnt says:

This was my name in high school

43. J W says:

How much force would it take to crush the penny into the black hole?

44. Dave The Blue says:

How about a black hole size of a atom

45. Binayak Rout says:

Real quest iz can we make a tiny black hole or an antimatter in any worse case ?

46. Bashus Scratch says:

both options sound like a good time, honestly.

47. Todd Howard says:

Basically:
Its made of the coin: your fine, you lose the coin though
Its the size of a coin: everyone dies

48. A drunk Russian guy says:

0:44 "Kame… Hame… HA!"

49. A Demogorgon says:

2:48 Doctor Who.

50. Дмитрий Мариняк says:

Tardis at asteroids!

51. AVIATION TRIP REPORTS says:

2:48 The T.A.R.D.I.S.

52. Akira Sovereign says:

Another really amazing video

53. Abby Ayala says:

hey at least i get to keep my coin

54. snoןnǝɯǝɯ says:

Just buy another pair of jeans lol

55. ORE THE ULTIMATE SHOT SLAYER 69 says:

Me: Okay Maxy here is your new home!
Maxy: Eats it
Me: Ma-
Maxy: Eats the entire universe
Me: Maxy! How many times do I have to tell you to stop eating everything?

56. thethaichannel says:

Earth is literally being consumed by a black hole

“It’s totally awesome!”

57. Megan Fei YEAP ATKINS says:

I love the birds

58. WhiteHawkUK says:

There is no such thing as "Hawking Radiation" – it's the 20th/21st century equivalent of Orgone. It has always been a load of bollocks concocted by a man who confused virtual particles for real ones, conflated negative charge for negative mass, and didn't seem to understand the difference between an electron and photon.

I wonder how many years it will take before someone with appropriate authority has the balls to say "Hawking was full of s***" and have everyone breathe a sigh of relief?

59. selforganisation says:

This could be the tagline of this channel.

60. gözde özgür says:

i cant leave this channel hlp.

61. Fractal Infinitum says:

0:06 = ok I'm done

62. Arence Agcaoili says:

Long answer: There is a 100% chance that you will cease to exist

63. Nathanael super Tech says:

Wheres my nickle?

Wait…

64. Don't talk to me Im useless says:

What if my GF has a big black hole

65. Patrick Owens says:

No!!!!!!!!

66. Canem Cave says:

so what happened to the coin?

67. DnknDonuts says:

Anyone else see a tardis in the video as the asteroids were passing?

68. Biswajit Nath says:

me:what happens when……
kurzgesagt : you die
me: let me finis….
kurzgesast : you die
me: (annoyed)… for god's sake… plz listen…
kurzgesagt :…….
me: so, what happens when you step on…..
kurzgesagt :you die!
me: 😑😑😑😑😑

69. Jayshri Lohar says:

Short answer – "you will die".
Long answer -" you will also die"
Nice going 🙄🙄🙄

70. Prateek Sridhar says:

Found the doctor who easter egg.

71. Blackhole 123 says:

I love black holes and your videos ♥️♥️♥️♥️

72. SinosMeme says:

eyeball 2:22

73. Renáta Béres says:

Even micro micro micro black holes aren't safe

Can’t I hide in that tardis that flew by?

75. FplusE TV Channel says:

1:45 "don't try to stand on a black hole"
well duhh

76. LittleHong38 :D says:

I’ll throw it in every school.

77. Cedric says:

reaches into pocket for phone
hmm… my phone isnt there. maybe i didnt bring it?
no, its not that. where the hell did my hand go?

78. Scorpion says:

Nobody:

Kurzgesagt:

79. kcwflare says:

its not unimaginably small unless its a plank10^-39

80. Pseudo noob says:

if black hole is a hole in space time fabric , why will it orbit sun along with earth ?

81. DMroj0 says:

“don’t try to stand on a black hole”

this video saved my life. just cancelled my plane tickets to visit the coin

82. Ibraheem Khazbak says:

If a black hole was in my pocket I would get a free blowjob

83. ifly6 says:

What empirical proof do we have of Hawking radiation?

84. WIREFRAME says:

Ey I saw that tardis!

Long answer, you die, and then interesting things start happening.

86. Aaron Neil says:

I did'nt know blackhole has a weight.

87. Sam Miner says:

2:50
Earth : Police help me! I’m getting robbed!

88. Lorenzo Fuggetta says:

there was no kurzgesacht intro!!!

89. ManMan Tuber says:

What would happen if you had the gravity of a black hole

90. Balerdoch says:

freaking thardes

91. raghu devarakonda says:

92. Gairik Dey says:

Is that the Tardis ?

93. KeyTheKiwi says:

you sub to me i'll sub to you i'm fast

94. superdavidss says:

and more thing, the "Earth shell" would probably be very unstable and might eventually collapse to the BH itself.

95. strange love says:

a never ending and Xpanding deep throat till it collapses … have fun with it .

96. strange love says:

just push my wrong buttons and get 1
4 free … jusdt do it… make us soso proud of autriche again .

97. Spider World says:

I will eet a black hole of doom

98. Alvin YANG says:

2:49 why is there a phone?

99. Just sub to me for no Reason says:

2:50 Dr. Who reference 😀