Free falling in outer space - Matt J. Carlson

Slobodan pad u dubokom svemiru - Met Dž. Karlson (Matt J. Carlson)

Prevodilac: Mile Živković Lektor: Anja Saric

Have you ever been floating in a swimming pool,

Da li ste ikada plutali u bazenu,

all comfy and warm, thinking,

bilo vam je udobno i mislili ste:

"Man, it'd be cool to be an astronaut!

"Čoveče, baš bi bilo kul biti astronaut!

You could float out in outer space, look down at the Earth and everything.

Možeš da lebdiš u dubokom svemiru,

gledaš dole na Zemlju i tako to.

It'd be so neat!"

Baš bi bilo super!"

Samo što uopšte nije tako.

Only that's not how it is at all.

If you are in outer space, you are orbiting the Earth:

Ako ste u dubokom svemiru,

vi kružite Zemljom

i to se zove slobodnim padom.

it's called free fall.

You're actually falling towards the Earth.

Zapravo padate ka Zemlji.

U redu, razmislite o ovome na sekund.

Think about this for a moment: that's the feeling you get

To je osećaj koji imate

if you're going over the top of a roller coaster, going, like, "Whoa!"

ako krećete preko vrha tobogana,

idete kao: "Vaaaau!"

Only you're doing this

Samo što ovo radite stalno

the whole time you're orbiting the Earth,

dok kružite Zemljom

dva,

for two, three, four hours, days.

tri,

četiri

sata,

Whatever it takes, right?

dana,

koliko god, zar ne?

So, how does orbiting work?

Kako onda funkcioniše kruženje oko planete?

Let's take a page from Isaac Newton.

Posavetujmo se sa Isakom Njutnom.

He had this idea, a little mental experiment:

Imao je ovu zamisao,

mali misaoni eksperiment.

You take a cannon,

Uzmete top,

you put it on top of a hill.

stavite ga na vrh brda.

Ako ispalite đule,

If you shoot the cannonball,

it goes a little bit away.

ono se malo udalji.

But if you shoot it harder,

Ali ukoliko ga ispalite jače,

it goes far enough so that it lands

ode dovoljno daleko da se spusti

a little bit past the curvature of Earth.

malo iznad krive Zemlje.

Možete onda zamisliti,

Well, you can imagine if you shot it really, really, hard,

kada bi ga ispalili veoma, veoma jako,

it would go all the way around the Earth

otišlo bi skroz oko Zemlje

and come back -- boom! -- and hit you in the backside or something.

i vratilo se, bum!

i udarilo vas u leđa ili tako nešto.

Vratimo se skroz nazad

Let's zoom way back and put you in a little satellite

i stavićemo vas u maleni satelit

over the North Pole of the Earth

iznad Zemljinog Severnog pola

and consider north to be up.

i smatrajte da je sever gore.

You're going to fall down and hit the Earth.

Pašćete i udariti u Zemlju.

Ali zapravo se krećete postrance veoma brzo.

But you are actually moving sideways really fast.

So when you fall down,

Kada padnete,

promašićete.

you're going to miss.

You're going to end up on the side of the Earth, falling down,

Završićete na strani Zemlje,

padajući dole,

and now the Earth is pulling you back in sideways.

i Zemlja vas sada uvlači postrance.

So it's pulling you back in and you fall down,

U redu, i uvlači vas postrance

i padate dole,

and so you miss the Earth again, and now you're under the Earth.

i opet promašujete Zemlju

i sada ste ispod Zemlje.

I Zemlja će vas povući nagore

The Earth is going to pull you up, but you're moving sideways still.

ali još se pomerate postrance.

Tako da opet promašujete Zemlju.

So you're going to miss the Earth again.

Sada ste sa druge strane Zemlje,

Now you're on the other side of the Earth, moving upward,

krećući se nagore a Zemlja vas vuče postrance.

and the Earth's pulling you sideways.

U redu, pašćete postrance

So you're going to fall sideways,

ali kretaćete se nagore pa ćete promašiti.

but you're going to be moving up and so you'll miss.

I sada ste opet povrh Zemlje,

Now you're back on top of the Earth again, over the North Pole,

iznad Severnog pola,

going sideways and falling down,

idete postrance i padate nadole,

and yep -- you guessed it.

i pogodili ste.

Nastavićete da promašujete jer se krećete tako brzo.

You'll keep missing because you're moving so fast.

In this way, astronauts orbit the Earth.

Astronauti ovako kruže Zemljom.

They're always falling towards the Earth,

Uvek padaju ka Zemlji,

but they're always missing, and therefore, they're falling all the time.

ali uvek promašuju

i stoga stalno padaju.

They feel like they're falling, so you just have to get over it.

Imaju osećaj da padaju

pa to moraju da nekako prihvate.

So technically, if you ran fast enough and tripped,

Zapravo, ako biste trčali dovoljno brzo i sapleli se,

you could miss the Earth.

mogli biste da promašite Zemlju.

Ali postoji veliki problem.

But there's a big problem.

First, you have to be going eight kilometers a second.

Prvo, trebalo bi da idete 8 kilometara u sekundi.

That's 18,000 miles an hour,

To je 29 000 kilometara na čas,

just over Mach 23!

malo više od 23 maha!

The second problem:

Drugi problem:

ako biste išli tako brzo,

If you're going that fast,

yes, you would orbit the Earth and come back where you came from,

da, kružili biste Zemljom

i vratili se odakle ste krenuli,

but there's a lot of air in the way,

ali na putu ima dosta vazduha,

much less people and things.

ljudi i drugih stvari.

So you would burn up due to atmospheric friction.

Tako da biste izgoreli zbog atmosferskog trenja.

So, I do not recommend this.

Tako da ne bih ovo preporučio.