Carolyn Porco: This is Saturn

55,869 views ・ 2007-10-12

TED


Please double-click on the English subtitles below to play the video.

Prevodilac: Milan Jaćević Lektor: Ana Zivanovic-Nenadovic
00:25
In the next 18 minutes, I'm going to take you on a journey.
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U narednih 18 minuta, povešću vas na putovanje.
00:28
And it's a journey that you and I have been on for many years now,
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Vi i ja smo na tom smo putovanju već mnogo godina;
00:33
and it began some 50 years ago, when humans first stepped off our planet.
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ono je otpočelo pre nekih 50 godina, kada su ljudi prvi put kročili van naše planete.
00:39
And in those 50 years, not only did we literally, physically set foot on the moon,
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Tokom tih 50 godina, ne samo da smo bukvalno kročili na Mesec,
00:46
but we have dispatched robotic spacecraft to all the planets -- all eight of them --
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već smo i poslali robotske svemirske letelice do svih planeta -- njih osam --
00:53
and we have landed on asteroids, we have rendezvoused with comets,
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takođe smo sleteli na asteroide, ostvarili kontakt sa kometama,
00:57
and, at this point in time, we have a spacecraft on its way to Pluto,
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a trenutno imamo i letelicu na putu ka Plutonu,
01:02
the body formerly known as a planet.
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svemirskom telu ranije znanom kao planeta.
01:05
And all of these robotic missions are part of a bigger human journey:
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Ove robotske misije su deo većeg ljudskog putovanja;
01:11
a voyage to understand something, to get a sense of our cosmic place,
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putovanja ka razumevanju nečega, smisla našeg mesta u kosmosu,
01:18
to understand something of our origins, and how Earth, our planet,
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ka razumevanju našeg porekla, i toga kako je nastala naša planeta, Zemlja,
01:23
and we, living on it, came to be.
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i mi, koji na njoj živimo.
01:25
And of all the places in the solar system that we might go to
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Od svih mesta u Sunčevom sistemu do kojih bismo mogli otići
01:28
and search for answers to questions like this,
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u potrazi za odgovorima na ovakva pitanja,
01:32
there's Saturn. And we have been to Saturn before --
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izdvaja se Saturn. Bili smo do Saturna i ranije --
01:35
we visited Saturn in the early 1980s --
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posetili smo ga ranih osamdesetih --
01:38
but our investigations of Saturn have become far more in-depth in detail
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ali su naša istraživanja Saturna postala mnogo opsežnija i detaljnija
01:43
since the Cassini spacecraft, traveling across interplanetary space
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od kako je svemirska letelica Kasini, putujući kroz interplanetarni prostor
01:47
for seven years, glided into orbit around Saturn in the summer of 2004,
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tokom sedam godina, ušla u orbitu oko Saturna, u leto 2004. godine,
01:53
and became at that point the farthest robotic outpost
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i postala, u tom trenutku, najdalja robotska stanica
01:56
that humanity had ever established around the Sun.
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koju je čovečanstvo ikada postavilo oko Sunca.
01:59
Now, the Saturn system is a rich planetary system.
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Saturnov sistem je bogat planetarni sistem.
02:04
It offers mystery, scientific insight and obviously splendor beyond compare,
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Nudi misteriju, naučni uvid i, očigledno, lepotu bez premca;
02:11
and the investigation of this system has enormous cosmic reach.
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istraživanje ovog sistema je od ogromnog kosmološkog značaja.
02:15
In fact, just studying the rings alone, we stand to learn a lot
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Zapravo, samo kroz proučavanje njegovih prstenova možemo mnogo naučiti
02:19
about the discs of stars and gas that we call the spiral galaxies.
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o diskovima zvezda i gasa koje nazivamo spiralnim galaksijama.
02:24
And here's a beautiful picture of the Andromeda Nebula,
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Ovo je prelepa fotografija magline Andromeda,
02:26
which is our closest, largest spiral galaxy to the Milky Way.
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Mlečnom Putu najbliže i najveće spiralne galaksije.
02:30
And then, here's a beautiful composite of the Whirlpool Galaxy,
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A ovo je prelepa kompozitna fotografija galaksije Vrtlog,
02:33
taken by the Hubble Space Telescope.
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koju je uslikao svemirski teleskop Habl.
02:35
So the journey back to Saturn is really part of and is also a metaphor
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Tako da je put do Saturna zapravo deo -- i u isto vreme metafora za --
02:41
for a much larger human voyage
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mnogo veće kosmičko putovanje,
02:43
to understand the interconnectedness of everything around us,
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čiji je cilj razumevanje međusobne povezanosti svega oko nas,
02:47
and also how humans fit into that picture.
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i toga kako se ljudi uklapaju u celu tu sliku.
02:50
And it pains me that I can't tell you all that we have learned with Cassini.
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Boli me što vam ne mogu reći sve što smo naučili preko Kasinija --
02:57
I can't show you all the beautiful pictures that we've taken
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što vam ne mogu pokazati sve prelepe fotografije koje smo uslikali
03:00
in the last two and a half years, because I simply don't have the time.
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tokom poslednje dve i po godine, jer, jednostavno, nemam dovoljno vremena.
03:03
So I'm going to concentrate on two of the most exciting stories
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Zato ću se koncentrisati na dve najzanimljivije priče
03:07
that have emerged out of this major exploratory expedition
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koje su rezultat ove velike istraživačke ekspedicije
03:11
that we are conducting around Saturn,
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koju trenutno izvodimo oko Saturna,
03:13
and have been for the past two and a half years.
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koju smo izvodili protekle dve i po godine.
03:16
Saturn is accompanied by a very large and diverse collection of moons.
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Saturn okružuje velika i raznolika kolekcija meseca.
03:20
They range in size from a few kilometers across to as big across as the U.S.
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Njihov prečnik je od nekoliko kilometara do veličine Sjedinjenih Država.
03:25
Most of the beautiful pictures we've taken of Saturn, in fact,
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Neke od najlepših fotografija Saturna koje smo uslikali, zapravo
03:28
show Saturn in accompaniment with some of its moons. Here's Saturn with Dione,
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pokazuju Saturn u pratnji nekih od njegovih meseca. Ovo je Saturn sa Dionom,
03:33
and then, here's Saturn showing the rings edge-on,
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a ovo je Saturn sa svojim prstenovima,
03:36
showing you just how vertically thin they are, with the moon Enceladus.
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gde možete videti koliko su oni zapravo tanki, u pratnji meseca Encelad.
03:40
Now, two of the 47 moons that Saturn has are standouts.
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Dva od 47 meseca koje Saturn poseduje se izdvajaju.
03:45
And those are Titan and Enceladus. Titan is Saturn's largest moon,
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A ta dva su Titan i Encelad. Titan je Saturnov drugi po veličini mesec,
03:50
and, until Cassini had arrived there,
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i, dok Kasini nije stigla do njega,
03:52
was the largest single expanse of unexplored terrain
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predstavljao je najveću pojedinačnu neistraženu teritoriju
03:56
that we had remaining in our solar system.
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koja je preostala u Sunčevom sistemu.
04:00
And it is a body that has long intrigued people who've watched the planets.
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To je nebesko telo koje je dugo intrigiralo ljude koji su posmatrali planete.
04:04
It has a very large, thick atmosphere,
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Ima vrlo veliku, gustu atmosferu
04:08
and in fact, its surface environment was believed to be
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i dugo se mislilo da je okruženje na njegovoj površini
04:12
more like the environment we have here on the Earth,
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sličnije onome koje imamo ovde na Zemlji,
04:16
or at least had in the past, than any other body in the solar system.
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ili koje smo makar nekada imali, nego okruženje bilo kog drugog nebeskog tela u Sunčevom sistemu.
04:20
Its atmosphere is largely molecular nitrogen, like you are breathing here in this room,
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Njegova atmosfera se mahom sastoji od azota, poput onog koji udišemo u ovoj prostoriji,
04:25
except that its atmosphere is suffused with
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osim što je njegova atmosfera ispunjena i
04:27
simple organic materials like methane and propane and ethane.
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prostim organskim materijalima, poput metana, propana i etana.
04:31
And these molecules high up in the atmosphere of Titan
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Ovi molekuli, visoko u Titanovoj atmosferi,
04:34
get broken down, and their products join together to make haze particles.
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se razgrađuju, a zatim međusobno spajaju u čestice izmaglice.
04:39
This haze is ubiquitous. It's completely global and enveloping Titan.
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Ova izmaglica je sveobuhvatna; u potpunosti prekriva Titan.
04:44
And that's why you cannot see down to the surface
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Zbog toga ne možete videti njegovu površinu
04:47
with our eyes in the visible region of the spectrum.
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u vidljivom delu spektra, ljudskim očima.
04:49
But these haze particles, it was surmised,
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Pre nego što je tamo stigla Kasini, nagađalo se da ove čestice izmaglice,
04:52
before we got there with Cassini, over billions and billions of years,
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tokom milijardi i milijardi godina,
04:56
gently drifted down to the surface and coated the surface
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polako padaju do površine, i obavijaju je u sloj
05:00
in a thick organic sludge.
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gustog organskog mulja.
05:01
So like the equivalent, the Titan equivalent, of tar, or oil, or what -- we didn't know what.
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Nešto poput Titanovog ekvivalenta katrana ili ulja -- nismo tačno znali čega.
05:08
But this is what we suspected. And these molecules,
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To smo pretpostavljali. Na površinskoj temperaturi Titana
05:10
especially methane and ethane, can be liquids at the surface temperatures of Titan.
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ovi molekuli, naročito metan i etan, mogu biti u tečnom stanju.
05:19
And so it turns out that methane is to Titan what water is to the Earth.
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Ispostavilo se da je metan za Titan ono što je voda za Zemlju.
05:24
It's a condensable in the atmosphere,
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Kondenzuje se u atmosferi.
05:26
and so recognizing this circumstance brought to the fore
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Prepoznavanje ove okolnosti dovelo je u prvi plan
05:31
a whole world of bizarre possibilities. You can have methane clouds, OK,
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čitav jedan svet bizarnih mogućnosti. Recimo, moguće je da postoje oblaci metana,
05:36
and above those clouds, you have this hundreds of kilometers of haze,
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a iznad ovih oblaka na hiljade kilometara izmaglice
05:39
which prevent any sunlight from getting to the surface.
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koja sprečava sunčevu svetlost u prodiranju do površine.
05:41
The temperature at the surface is some 350 degrees below zero Fahrenheit.
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Temperatura na površini je nekih 215 stepeni Celzijusa ispod nule.
05:47
But despite that cold, you could have rain falling down on the surface of Titan.
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Ali, uprkos ovolikoj hladnoći, moguće je da na površini Titana pada kiša,
05:53
And doing on Titan what rain does on the Earth: it carves gullies; it forms rivers
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i da čini ono što kiša čini na Zemlji -- stvara jaruge, formira reke
05:56
and cataracts; it can create canyons; it can pool in large basins and craters.
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i vodopade. Ona može stvarati kanjone, ili se skupljati u velikim basenima i kraterima.
06:03
It can wash the sludge off high mountain peaks and hills,
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Može da spere mulj sa visokih planinskih i brdskih vrhova
06:06
down into the lowlands. So stop and think for a minute.
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dole u nizije. Zastanite na trenutak i razmislite o tome.
06:09
Try to imagine what the surface of Titan might look like.
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Pokušajte da zamislite kako bi površina Titana mogla da izgleda.
06:13
It's dark. High noon on Titan is as dark as deep earth twilight on the Earth.
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Mračno je -- podne na Titanu je mračno poput najmračnijeg sumraka na Zemlji.
06:18
It's cold, it's eerie, it's misty,
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Hladno je, jezivo, maglovito,
06:20
it might be raining, and you might be standing
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možda pada kiša, a vi možda stojite
06:23
on the shores of Lake Michigan brimming with paint thinner. (Laughter)
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na obali jezera Mičigen iz kojeg isparava razređivač.
06:27
That is the view that we had of the surface of Titan before we got there with Cassini,
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Ovo je predstava površine Titana kakvu smo imali pre nego što je tamo došla Kasini,
06:32
and I can tell you that what we have found on Titan, though it is not the same in detail,
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i mogu vam reći da je ono što smo pronašli na Titanu, iako ne do detalja isto,
06:39
is every bit as fascinating as that story is.
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podjednako fascinantno kao ova priča.
06:42
And for us, it has been like -- the Cassini people --
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Za nas, ljude pri misiji Kasini,
06:44
it has been like a Jules Verne adventure come true.
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to je bilo poput avanture Žila Verna koja se ostvarila.
06:48
As I said, it has a thick, extensive atmosphere.
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Kao što rekoh, Titan je okružen gustim atmosferskim slojem.
06:50
This is a picture of Titan, backlit by the Sun, with the rings as a beautiful backdrop.
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Ovo je fotografija Titana, obasjana Suncemu iza, kao i sa njegovim prstenovima u pozadini.
06:55
And yet another moon there --
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Ovde je još jedan mesec --
06:57
I don't even know which one it is. It's a very extensive atmosphere.
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ne znam čak ni koji je u pitanju. Atmosfera je vrlo široka.
07:00
We have instruments on Cassini which can see down to the surface
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Na Kasiniju imamo instrumente pomoću kojih možemo da vidimo površinu
07:03
through this atmosphere, and my camera system is one of them.
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kroz ovu atmosferu; moja kamera je jedan od njih.
07:07
And we have taken pictures like this.
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Uslikali smo fotografije poput ove.
07:09
And what you see is bright and dark regions, and that's about as far as it got for us.
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Ono što vidite jesu svetli i tamni regioni -- to je bilo sve što smo mogli da vidimo.
07:14
It was so mystifying: we couldn't make out what we were seeing on Titan.
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Bilo je tako mistično -- nismo mogli da shvatimo šta to gledamo na Titanu.
07:18
When you look closer at this region, you start to see things
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Ako pogledate ovu regiju malo bliže, možete videti nešto
07:23
like sinuous channels -- we didn't know. You see a few round things.
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poput krivudavih kanala, ili nečeg sličnog. Vidite nekoliko okruglih stvari.
07:27
This, we later found out, is, in fact, a crater,
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Ovo je, kako smo kasnije saznali, krater,
07:29
but there are very few craters on the surface of Titan,
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a na površini Titana ima jako malo kratera,
07:32
meaning it's a very young surface.
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što znači da je u pitanju vrlo mlada površina.
07:34
And there are features that look tectonic.
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Postoje i odlike koje izgledaju tektonski.
07:36
They look like they've been pulled apart.
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Kao da su se razdvojile jedna od druge.
07:38
Whenever you see anything linear on a planet,
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Kada god vidite nešto pravolinijsko na planeti,
07:40
it means there's been a fracture, like a fault.
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to znači da je došlo do frakture, poput raseda.
07:44
And so it's been tectonically altered.
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Znači, došlo je do tektonske promene.
07:46
But we couldn't make sense of our images,
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Ali, nismo mogli da shvatimo šta je na fotografijama,
07:48
until, six months after we got into orbit,
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sve dok se šest meseci nakon ulaska u orbitu
07:52
an event occurred that many have regarded
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nije dogodilo nešto što su mnogi okarakterisali
07:54
as the highlight of Cassini's investigation of Titan.
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kao vrhunac Kasinijevog istraživanja Titana --
07:57
And that was the deployment of the Huygens probe,
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postavljanje sonde Hajgens,
08:00
the European-built Huygens probe that Cassini had carried
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sonde razvijene u Evropi, koju je Kasini nosila
08:03
for seven years across the solar system. We deployed it to the atmosphere of Titan,
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sedam godina kroz Sunčev sistem. Postavili smo je u Titanovoj atmosferi,
08:07
it took two and a half hours to descend, and it landed on the surface.
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i trebalo joj je dva i po sata da se spusti i sleti do površine.
08:11
And I just want to emphasize how significant an event this is.
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Želela bih da naglasim koliko je značajan ovakav događaj.
08:15
This is a device of human making,
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U pitanju je sprava koju je napravio čovek,
08:18
and it landed in the outer solar system for the first time in human history.
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a koja je sletela u spoljni Sunčev sistem, po prvi put u istoriji čovečanstva.
08:22
It is so significant that, in my mind,
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Po mom mišljenju, ovaj događaj je bio toliko značajan
08:26
this was an event that should have been celebrated
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da je trebalo da bude proslavljen
08:28
with ticker tape parades in every city across the U.S. and Europe,
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paradama u svakom gradu u Sjedinjenim Državama i Evropi,
08:33
and sadly, that wasn't the case.
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što, nažalost, nije bio slučaj.
08:35
(Laughter).
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(Smeh)
08:37
It was significant for another reason. This is an international mission,
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Bio je značajan i zbog još jednog razloga. Ovo je međunarodna misija,
08:40
and this event was celebrated in Europe, in Germany,
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i ovaj je događaj proslavljen u Evropi, u Nemačkoj,
08:43
and the celebratory presentations were given in English accents,
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gde su govornici davali prezentacije engleskim akcentom,
08:47
and American accents, and German accents, and French and Italian and Dutch accents.
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američkim i nemačkim akcentom, francuskim, italijanskim i holandskim akcentom.
08:53
It was a moving demonstration of what the words
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To je bila dirljiva predstava onoga što bi reči
08:57
"united nations" are supposed to mean:
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"Ujedinjene Nacije" zapravo trebalo da predstavljaju:
08:59
a true union of nations joined together in a colossal effort for good.
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pravu zajednicu nacija, udruženih u ogromnom naporu za opšte dobro.
09:05
And, in this case, it was a massive undertaking to explore a planet,
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U ovom slučaju, u pitanju je bio masivan zadatak istraživanja planete
09:09
and to come to understand a planetary system
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i razumevanja planetarnog sistema
09:12
that, for all of human history, had been unreachable,
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koji je, kroz ljudsku istoriju, bio nedostupan,
09:16
and now humans had actually touched it.
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i kome su sada ljudi zapravo prišli.
09:18
So it was -- I mean, I'm getting goose bumps just talking about it.
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Tako da je u pitanju bio -- ježim se i dok govorim o tome,
09:22
It was a tremendously emotional event,
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bio je to neverovatno emotivan događaj,
09:24
and it's something that I will personally never forget, and you shouldn't either.
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nešto što, lično, neću nikada zaboraviti, a ni vi ne bi trebalo.
09:29
(Applause).
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(Aplauz)
09:35
But anyway, the probe took measurements of the atmosphere on the way down,
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Bilo kako bilo, sonda je izvršila merenja atmosfere dok se spuštala,
09:38
and it also took panoramic pictures.
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a takođe je uslikala i panorame.
09:40
And I can't tell you what it was like to see the first pictures
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Ne mogu vam objasniti kako je to bilo, videti prve fotografije
09:44
of Titan's surface from the probe. And this is what we saw.
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površine Titana koje je napravila sonda. Evo šta smo videli.
09:48
And it was a shocker, because it was everything we wanted
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Ovo nas je šokiralo, jer je bilo sve što smo želeli
09:51
those other pictures taken from orbit to be.
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da one ranije slike iz orbite budu.
09:53
It was an unambiguous pattern, a geological pattern.
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Radi se o nedvosmislenom, geološkom obrascu.
09:57
It's a dendritic drainage pattern that can be formed only by the flow of liquids.
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Ovo je obrazac dendritske drenaže, koju može formirati jedino tok tečnosti.
10:02
And you can follow these channels
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Možete pratiti ove kanale
10:04
and you can see how they all converge.
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i videti kako se oni spajaju.
10:05
And they converge into this channel here, which drains into this region.
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Spajaju se u ovaj kanal ovde, koji otiče u ovaj region.
10:09
You are looking at a shoreline.
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Trenutno gledate u obalu.
10:11
Was this a shoreline of fluids? We didn't know.
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Da li je ovo obala tečnosti? Nismo znali.
10:14
But this is somewhat of a shoreline.
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Ali, ovo je nešto što podseća na obalu.
10:16
This picture is taken at 16 kilometers.
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Ova fotografija je uslikana na visini od 16 kilometara.
10:18
This is the picture taken at eight kilometers, OK? Again, the shoreline.
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Ovo je fotografija uslikana na visini od osam kilometara. Ponovo vidimo obalu.
10:22
Okay, now, 16 kilometers, eight kilometers -- this is roughly an airline altitude.
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Dakle, šesnaest kilometara, osam kilometara -- otprilike kao visina avionskog leta.
10:27
If you were going to take an airplane trip across the U.S.,
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Ukoliko bi putovali avionom preko Sjedinjenih Država,
10:30
you would be flying at these altitudes.
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leteli biste na ovim visinama.
10:32
So, this is the picture you would have at the window of Titanian Airlines
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Ovo je ono što biste videli kroz prozor leta Titan Erlajnsa
10:36
as you fly across the surface of Titan. (Laughter)
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dok letite preko površine Titana. (Smeh)
10:39
And then finally, the probe came to rest on the surface,
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Zatim se, konačno, sonda spustila na površinu,
10:43
and I'm going to show you, ladies and gentlemen,
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i ono što ću vam pokazati, dame i gospodo,
10:45
the first picture ever taken from the surface of a moon in the outer solar system.
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jesu prve fotografije ikada snimljene sa površine meseca u spoljnom Sunčevom sistemu.
10:49
And here is the horizon, OK?
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Ovo je horizont, u redu?
10:53
These are probably water ice pebbles, yes?
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A ovo su verovatno komadi leda.
10:57
(Applause).
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(Aplauz)
11:02
And obviously, it landed in one of these flat, dark regions
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Očigledno, sonda je sletela u jedan od ovih ravnih, tamnih regiona
11:06
and it didn't sink out of sight. So it wasn't fluid that we landed in.
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i nije potonula -- znači, nismo sleteli u neku tečnost.
11:11
What the probe came down in was basically
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Ono u šta je sonda sletela je, u suštini,
11:14
the Titan equivalent of a mud flat.
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Titanov ekvivalent blata.
11:17
This is an unconsolidated ground that is suffused with liquid methane.
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To je rastresito tlo, ispunjeno tečnim metanom.
11:22
And it's probably the case that this material
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Ovaj materijal se najverovatnije
11:25
has washed off the highlands of Titan
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sprao sa visija na Titanu
11:29
through these channels that we saw,
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kroz kanale koje smo ranije videli,
11:30
and has drained over billions of years to fill in low-lying basins.
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i, tokom milijardi godina, punio je basene u nizijama.
11:34
And that is what the Huygens probe landed in.
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U to je sletela sonda Hajgens.
11:37
But still, there was no sign in our images,
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Ipak, na našim fotografijama, čak ni u onima koje je načinila sonda Hajgens,
11:41
or even in the Huygens' images, of any large, open bodies of fluids.
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nije bilo znakova velikih basena tečnosti.
11:46
Where were they? It got even more puzzling when we found dunes.
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Gde su oni bili? Sve je postalo još čudnije kada smo otkrili dine.
11:51
OK, so this is our movie of the equatorial region of Titan,
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U redu, ovo je naš snimak regiona oko ekvatora na Titanu,
11:54
showing these dunes. These are dunes that are 100 meters tall,
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koji pokazuje dine. Ove su dine visoke oko 100 metara,
11:57
separated by a few kilometers,
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nekoliko kilometara odvojene jedna od druge,
12:00
and they go on for miles and miles and miles.
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a pružaju se kilometrima i kolometrima.
12:03
There's hundreds, up to a 1,000 or 1,200 miles of dunes.
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Na stotine, oko 1,600 ili 2,000 kilometara dina.
12:06
This is the Saharan desert of Titan.
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Ovo je Titanova verzija pustinje Sahara.
12:09
It's obviously a place which is very dry, or you wouldn't get dunes.
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Očigledno je reč o mestu koje je vrlo suvo, jer, inače, ne biste imali dine.
12:14
So again, it got puzzling that there were no bodies of fluid,
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Ponovo, bilo je vrlo čudno što nismo našli basene tečnosti,
12:19
until finally, we saw lakes in the polar regions.
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sve dok, konačno, nismo uočili jezera u polarnim regijama.
12:23
And there is a lake scene in the south polar region of Titan.
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Ovo je fotografija jezera u južnoj polarnoj regiji Titana.
12:27
It's about the size of Lake Ontario.
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Otprilike je veličine jezera Ontario.
12:29
And then, only a week and a half ago,
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A onda smo, pre samo nedelju i po,
12:30
we flew over the north pole of Titan and found, again,
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preleteli preko Titanovog severnog pola, i ponovo pronašli
12:34
we found a feature here the size of the Caspian Sea.
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oblast veličine Kaspijskog mora.
12:39
So it seems that the liquids, for some reason we don't understand,
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Tako da se čini da su tečnosti, iz nekog nama nepoznatog razloga,
12:43
or during at least this season, are apparently at the poles of Titan.
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na polovima Titana, ili je to makar slučaj u ovo doba godine.
12:48
And I think you would agree that we have found Titan
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Mislim da ćete se složiti da ono što smo pronašli na Titanu
12:51
is a remarkable, mystical place. It's exotic, it's alien, but yet strangely Earth-like,
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pokazuje da je reč o neverovatnom, mističnom mestu. To je egzotičan, tuđinski svet, koji je ipak sličan Zemlji,
12:58
and having Earth-like geological formations
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koji poseduje geološke formacije slične onima na Zemlji
13:01
and a tremendous geographical diversity,
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i neverovatnu geografsku raznolikost;
13:05
and is a fascinating world whose only rival in the solar system
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to je fascinantan svet, koga po kompleksnosti i bogatstvu u Sunčevom sistemu
13:09
for complexity and richness is the Earth itself.
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može nadmašiti jedino planeta Zemlja.
13:12
And so now we go onto Enceladus. Enceladus is a small moon,
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Zatim smo stigli do Encelada. Encelad je mali mesec,
13:17
it's about a tenth the size of Titan. And you can see it here next to England,
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deset puta manji od Titana -- ovde ga možete videti u poređenju sa Engleskom.
13:21
just to show you the size. This is not meant to be a threat.
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Ovo je samo kako bismo ilustrovali veličinu; nije nikakva pretnja.
13:24
(Laughter).
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(Smeh)
13:26
And Enceladus is very white, it's very bright,
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Encelad je vrlo beo, vrlo svetao mesec,
13:30
and its surface is obviously wrecked with fractures.
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čija je površina očigledno prepuna fraktura;
13:34
It is a very geologically active body.
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reč je o vrlo geološki aktivnom nebeskom telu.
13:36
But the mother lode of discoveries on Enceladus
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Ali, glavno otkriće na Enceladu
13:38
was found at the south pole -- and we're looking at the south pole here --
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ima veze sa njegovim južnim polom -- koji ovde vidimo --
13:41
where we found this system of fractures.
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tamo je otkriven ovaj sistem fraktura.
13:44
And they're a different color because they're a different composition.
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One su drugačije boje jer su drugačijeg sastava.
13:46
They are coated. These fractures are coated with organic materials.
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Obložene su. Ove frakture su obložene organskim materijalima.
13:51
Moreover, this whole, entire region, the south polar region,
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Šta više, čitava regija južnog pola
13:55
has elevated temperatures. It's the hottest place on the planet, on the body.
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ima povišene temperature. To je najtoplije mesto na ovom nebeskom telu.
13:59
That's as bizarre as finding that the Antarctic on the Earth is hotter than the tropics.
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To je podjednako bizarno koliko i kada bismo otkrili da je na Antarktiku toplije nego li u tropskim predelima.
14:04
And then, when we took additional pictures, we discovered
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A zatim smo, kada smo uslikali dodatne fotografije, otkrili
14:07
that from these fractures are issuing jets of fine, icy particles
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da iz ovih fraktura pršte mlazevi finih čestica leda,
14:13
extending hundreds of miles into space.
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koje se izbacuju stotinama milja u svemir.
14:15
And when we color-code this image, to bring out the faint light levels,
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Kada ovu fotografiju kodiramo po bojama, da bismo istakli delove sa slabim svetlom,
14:18
we see that these jets feed a plume
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vidimo da ovi mlazevi stvaraju veliki stub,
14:22
that, in fact, we see, in other images, goes thousands of miles
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koji se, kao što vidimo na drugim fotografijama, prostire hiljadama milja
14:26
into the space above Enceladus.
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u svemir iznad Encelada.
14:28
My team and I have examined images like this,
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Moj tim i ja smo ispitali fotografije poput ove,
14:31
and like this one, and have thought about the other results from Cassini.
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ili ove, i puno razmišljali o drugim rezultatima sa Kasinija.
14:35
And we have arrived at the conclusion
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Došli smo do zaključka da je moguće
14:39
that these jets may be erupting from pockets
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da ovi mlazevi izviru iz džepova punih
14:42
of liquid water under the surface of Enceladus.
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tečne vode, koje se nalaze ispod površine Encelada.
14:46
So we have, possibly, liquid water, organic materials and excess heat.
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ž
14:51
In other words, we have possibly stumbled upon
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Drugim rečima, moguće je da smo nabasali
14:54
the holy grail of modern day planetary exploration,
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na Sveti gral modernog planetarnog istraživanja.
14:58
or in other words, an environment that is potentially suitable for living organisms.
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Na okolinu koja je teorijski pogodna za razvoj živih organizama.
15:02
And I don't think I need to tell you that the discovery of life
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Mislim da vam ne moram reći da bi otkriće života
15:05
elsewhere in our solar system,
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drugde u našem Sunčevom sistemu,
15:07
whether it be on Enceladus or elsewhere,
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bilo to na Enceladu ili negde drugde,
15:09
would have enormous cultural and scientific implications.
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imalo ogromne kulturne i naučne implikacije.
15:12
Because if we could demonstrate that genesis had occurred
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Jer, ako bismo mogli dokazati da se nastanak života dogodio
15:16
not once, but twice, independently, in our solar system,
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ne jednom, već dva puta, nezavisno, u našem Sunčevom sistemu,
15:20
then that means, by inference, it has occurred a staggering number of times
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to bi, logički gledano, značilo da se on dogodio neverovatan broj puta
15:24
throughout the universe and its 13.7 billion year history.
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svuda u Univerzumu, tokom njegove istorije duge 13.7 milijardi godina.
15:29
Right now, Earth is the only planet still that we know is teeming with life.
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Za sada je Zemlja jedina planeta za koju znamo da buja od života.
15:33
It is precious, it is unique,
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Dragocena je, jedinstvena,
15:36
it is still, so far, the only home we've ever known.
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i dalje jedini dom koji poznajemo.
15:39
And if any of you were alert and coherent during the 1960s --
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Ako je bilo ko od vas bio na oprezu i razumno razmišljao tokom 60ih --
15:46
and we'd forgive you, if you weren't, OK --
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a opraštamo vam ako niste bili, OK --
15:48
you would remember this very famous picture
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setićete se ove, vrlo poznate, fotografije,
15:50
taken by the Apollo 8 astronauts in 1968.
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koju su uslikali astronauti Apola VIII, 1968. godine.
15:54
It was the first time that Earth was imaged from space,
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To je prvi put da je Zemlja slikana iz svemira,
15:57
and it had an enormous impact on our sense of place in the universe,
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što je imalo ogromni uticaj na svest o našem mestu u Univerzumu,
16:00
and our sense of responsibility for the protection of our own planet.
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i na osećaj odgovornosti za zaštitu i očuvanje naše planete.
16:05
Well, we on Cassini have taken an equivalent first,
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Pa, mi sa misije Kasini smo po prvi put uslikali nešto slično,
16:09
a picture that no human eye has ever seen before.
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fotografiju onoga što nijedno ljudsko oko nikada ranije nije videlo.
16:13
It is a total eclipse of the Sun, seen from the other side of Saturn.
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Reč je o potpunom pomračenju Sunca, viđenom sa druge strane Saturna.
16:17
And in this impossibly beautiful picture,
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Na ovoj neopisivo lepoj fotografiji
16:21
you see the main rings backlit by the Sun,
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vidimo glavne prstenove obasjane Suncem u pozadini,
16:23
you see the refracted image of the Sun
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ž
16:26
and you see this ring created, in fact,
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i ovaj prsten, koji je, zapravo,
16:28
by the exhalations of Enceladus.
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stvorilo izbacivanje čestica sa Encelada.
16:31
But as if that weren't brilliant enough, we can spot, in this beautiful image,
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Ali, kao da to nije dovoljno sjajno, na ovoj prelepoj fotografiji možemo videti
16:37
sight of our own planet,
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i našu planetu,
16:39
cradled in the arms of Saturn's rings.
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kako leži u rukama Saturnovih prstenova.
16:43
Now, there is something deeply moving
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Postoji nešto vrlo dirljivo
16:45
about seeing ourselves from afar,
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u prizoru nas samih sa velike daljine,
16:47
and capturing the sight of our little, blue-ocean planet
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i slikanju naše male, plave, okeanske planete
16:50
in the skies of other worlds.
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kroz nebesa drugih svetova.
16:52
And that, and the perspective of ourselves that we gain from that,
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To osećanje i perspektiva o nama koju kroz njega dobijamo,
16:56
may be, in the end, the finest reward that we earn
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može, na kraju krajeva, biti najveća nagrada koju ćemo steći
17:00
from this journey of discovery that started half a century ago.
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na ovom putovanju otkrivanja, koje je započelo pre pola veka.
17:03
And thank you very much.
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Hvala vam puno.
17:05
(Applause)
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(Aplauz)

Original video on YouTube.com
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