TED Salon U.S. Air Force
Sarah T. Stewart: Where did the Moon come from? A new theory
Sarah T. Stewart: Kako je nastao Mjesec? Nova teorija
Filmed:
Readability: 4
2,805,305 views
Zemlja i Mjesec su poput identičnih blizanaca, građeni od istih materijala - što je prilično čudno jer niti jedno drugo nebesko tijelo koje poznajemo nema ovakvu kemijsku poveznicu s drugim nebeskim tijelom. Koji je razlog ove posebne povezanosti? U potrazi za odgovorom, planetarna znanstvenica i dobitnica nagrade MacArthur fundacije, Sarah T. Stewart, otkrila je novu vrstu nebeskog tijela - sinestiju - i novi odgovor na pitanje postanka Mjeseca.
Sarah T. Stewart - Planetary scientist
Sarah T. Stewart specializes in the study of collisions in the solar system. Full bio
Sarah T. Stewart specializes in the study of collisions in the solar system. Full bio
Double-click the English transcript below to play the video.
00:13
Nobody likes to make a mistake.
0
1161
2331
Nitko ne voli činiti pogreške.
00:16
And I made a whopping one.
1
4462
1847
A ja sam napravila ogromnu.
00:19
And figuring out what I did wrong
led to a discovery
led to a discovery
2
7534
5298
Moja je pogreška dovela do otkrića
00:24
that completely changes the way
we think about the Earth and Moon.
we think about the Earth and Moon.
3
12856
3497
koje u potpunosti mijenja način
na koji razmišljamo o Zemlji i Mjesecu.
na koji razmišljamo o Zemlji i Mjesecu.
00:29
I'm a planetary scientist,
4
17531
1920
Planetarna sam znanstvenica
00:31
and my favorite thing to do
is smash planets together.
is smash planets together.
5
19475
3730
i više od svega volim sudarati planete.
00:35
(Laughter)
6
23229
1011
(Smijeh)
00:36
In my lab, I can shoot at rocks
using cannons like this one.
using cannons like this one.
7
24264
5819
U laboratoriju mogu pucati
u stijene iz topova kao što je ovaj.
u stijene iz topova kao što je ovaj.
(Pucanj topa)
00:43
(Cannon shot)
8
31120
1246
00:44
(Laughter)
9
32762
1075
(Smijeh)
00:46
In my experiments, I can generate
the extreme conditions
the extreme conditions
10
34278
4032
Eksperimentima mogu stvoriti
ekstremne uvjete
ekstremne uvjete
00:50
during planet formation.
11
38334
1626
za vrijeme formacije planeta.
00:52
And with computer models,
I can collide whole planets together
I can collide whole planets together
12
40775
4018
A zahvaljujući računalnim modelima,
mogu međusobno sudarati čitave planete
mogu međusobno sudarati čitave planete
00:56
to make them grow,
13
44817
1710
da narastu
00:58
or I can destroy them.
14
46551
1587
ili da ih uništim.
01:00
(Laughter)
15
48162
1077
(Smijeh)
01:02
I want to understand
how to make the Earth and the Moon
how to make the Earth and the Moon
16
50354
4424
Želim shvatiti
kako stvoriti Zemlju i Mjesec
kako stvoriti Zemlju i Mjesec
01:06
and why the Earth is so different
from other planets.
from other planets.
17
54802
3240
i zašto se Zemlja
toliko razlikuje od drugih planeta.
toliko razlikuje od drugih planeta.
01:11
The leading idea for the origin
of the Earth and Moon
of the Earth and Moon
18
59414
3737
Prevladavajuća teorija
o nastanku Zemlje i Mjeseca
o nastanku Zemlje i Mjeseca
01:15
is called the "giant impact theory."
19
63175
1955
naziva se "teorija velikog udara".
01:18
The theory states that a Mars-sized body
struck the young Earth,
struck the young Earth,
20
66011
3408
Teorija tvrdi da je tijelo veličine Marsa
udarilo u mladu Zemlju,
udarilo u mladu Zemlju,
01:21
and the Moon formed from
the debris disc around the planet.
the debris disc around the planet.
21
69443
5325
a Mjesec je nastao iz prstena krhotina
koji je okružio planet.
koji je okružio planet.
01:28
The theory can explain
so many things about the Moon,
so many things about the Moon,
22
76061
3211
Ova teorija može objasniti
toliko toga o Mjesecu
toliko toga o Mjesecu
01:31
but it has a huge flaw:
23
79296
2021
ali ima jedan veliki nedostatak:
01:34
it predicts that the Moon is mostly made
from the Mars-sized planet,
from the Mars-sized planet,
24
82051
4531
po njoj je Mjesec većim dijelom
nastao od planeta veličine Marsa,
nastao od planeta veličine Marsa,
01:38
that the Earth and the Moon
are made from different materials.
are made from different materials.
25
86606
3344
po njoj su Zemlja i Mjesec
građeni od različitih materijala.
građeni od različitih materijala.
01:42
But that's not what we see.
26
90504
1661
Ali dokazi pokazuju suprotno.
01:45
The Earth and the Moon
are actually like identical twins.
are actually like identical twins.
27
93154
3717
Zemlja i Mjesec zapravo su
poput identičnih blizanaca.
poput identičnih blizanaca.
01:49
The genetic code of planets is written
in the isotopes of the elements.
in the isotopes of the elements.
28
97704
4897
Genetski kôd planeta zapisan je
u izotopima elemenata.
u izotopima elemenata.
01:54
The Earth and Moon
have identical isotopes.
have identical isotopes.
29
102625
2869
Zemlja i Mjesec imaju identične izotope.
01:57
That means that the Earth and Moon
are made from the same materials.
are made from the same materials.
30
105518
4641
Dakle, Zemlja i Mjesec
građeni su od istih materijala.
građeni su od istih materijala.
02:03
It's really strange that the Earth
and the Moon are twins.
and the Moon are twins.
31
111080
3623
Prilično je čudno
da su Zemlja i Mjesec blizanci.
da su Zemlja i Mjesec blizanci.
02:07
All of the planets are made
from different materials,
from different materials,
32
115160
2636
Svi su planeti građeni
od različitih materijala,
od različitih materijala,
02:09
so they all have different isotopes,
33
117820
2129
stoga imaju različite izotope,
02:11
they all have their own genetic code.
34
119973
2055
svaki ima svoj vlastiti genetski kôd.
02:14
No other planetary bodies
have the same genetic relationship.
have the same genetic relationship.
35
122695
4456
Niti jedno drugo nebesko tijelo
nema ovakvu genetsku poveznicu.
nema ovakvu genetsku poveznicu.
02:19
Only the Earth and Moon are twins.
36
127824
2447
Samo su Zemlja i Mjesec blizanci.
02:23
When I started working
on the origin of the Moon,
on the origin of the Moon,
37
131588
2575
Kad sam počela raditi
na postanku Mjeseca,
na postanku Mjeseca,
02:26
there were scientists that wanted to
reject the whole idea of the giant impact.
reject the whole idea of the giant impact.
38
134187
4077
bilo je znanstvenika koji su htjeli
potpuno odbaciti ideju o velikom udaru.
potpuno odbaciti ideju o velikom udaru.
02:30
They didn't see any way for this theory
to explain the special relationship
to explain the special relationship
39
138288
4181
Nisu vidjeli kako ovom teorijom objasniti
posebnu vezu Zemlje i Mjeseca.
02:34
between the Earth and the Moon.
40
142493
1736
02:36
We were all trying to think of new ideas.
41
144729
2554
Svi smo pokušavali smisliti nova rješenja.
02:40
The problem was,
there weren't any better ideas.
there weren't any better ideas.
42
148084
2980
Problem je bio
što nije bilo boljih rješenja.
što nije bilo boljih rješenja.
02:43
All of the other ideas
had even bigger flaws.
had even bigger flaws.
43
151768
3534
Sva su druga rješenja
imala još veće nedostatke.
imala još veće nedostatke.
02:48
So we were trying to rescue
the giant impact theory.
the giant impact theory.
44
156437
3622
Stoga smo pokušali spasiti
teoriju velikog udara.
teoriju velikog udara.
02:53
A young scientist in my group suggested
that we try changing the spin
that we try changing the spin
45
161376
4881
Mladi znanstvenik u mojoj grupi
predložio je da pokušamo promijeniti
predložio je da pokušamo promijeniti
rotaciju velikog udara.
02:58
of the giant impact.
46
166281
1365
02:59
Maybe making the Earth spin faster
could mix more material
could mix more material
47
167670
4394
Kad bi se Zemlja vrtjela brže,
možda bi se pomiješalo više materijala
možda bi se pomiješalo više materijala
03:04
and explain the Moon.
48
172088
1839
i objasnilo Mjesec.
03:06
The Mars-sized impactor had been chosen
49
174623
2683
Tijelo veličine Marsa odabrano je
03:09
because it could make the Moon
50
177330
1743
jer objašnjava i Mjesec
i duljinu Zemljinog dana.
03:11
and make the length of Earth's day.
51
179097
2941
03:15
People really liked
that part of the model.
that part of the model.
52
183227
2202
Ljudima se doista sviđao taj dio modela.
03:18
But what if something else determined
the length of Earth's day?
the length of Earth's day?
53
186481
3417
Ali što kada bi nešto drugo
određivalo duljinu Zemljinog dana?
određivalo duljinu Zemljinog dana?
03:22
Then there would be many more possible
giant impacts that could make the Moon.
giant impacts that could make the Moon.
54
190484
4722
Otvorila bi se mogućnost drugačijih
velikih udara kojima bi nastao Mjesec.
velikih udara kojima bi nastao Mjesec.
03:28
I was curious about what could happen,
55
196444
2665
Zanimalo me što bi se dogodilo
03:31
so I tried simulating
faster-spinning giant impacts,
faster-spinning giant impacts,
56
199133
4387
pa sam pokušala simulirati
velike udare brže rotacije
velike udare brže rotacije
03:35
and I found that it is possible
57
203544
2484
i otkrila da je moguće da prsten nastane
03:38
to make a disc out of the same
mixture of materials as the planet.
mixture of materials as the planet.
58
206052
3878
od iste mješavine materijala kao i planet.
03:42
We were pretty excited.
59
210871
2010
Bili smo prilično uzbuđeni.
03:44
Maybe this was the way
to explain the Moon.
to explain the Moon.
60
212905
2672
Možda je to način da objasnimo Mjesec.
03:48
The problem is, we also found
that that's just not very likely.
that that's just not very likely.
61
216950
5304
No također smo otkrili i da je
vjerojatnost za to vrlo mala.
vjerojatnost za to vrlo mala.
03:54
Most of the time, the disc
is different from the planet,
is different from the planet,
62
222278
3080
Prsten se u većini slučajeva
razlikuje od planeta
razlikuje od planeta
03:57
and it looked like
making our Moon this way
making our Moon this way
63
225382
2837
i činilo se da bi pokušaj da
na ovaj način izgradimo Mjesec
na ovaj način izgradimo Mjesec
04:00
would be an astronomical coincidence,
64
228243
3157
bio tek astronomska slučajnost,
04:04
and it was just hard
for everyone to accept the idea
for everyone to accept the idea
65
232243
2984
a svima je bilo teško prihvatiti ideju
04:07
that the Moon's special connection
to Earth was an accident.
to Earth was an accident.
66
235251
3811
da je Mjesečeva posebna povezanost
sa Zemljom samo slučajnost.
sa Zemljom samo slučajnost.
04:13
The giant impact theory
was still in trouble,
was still in trouble,
67
241220
2750
Teorija velikog udara
i dalje je bila u problemima,
i dalje je bila u problemima,
04:16
and we were still trying to figure out
how to make the Moon.
how to make the Moon.
68
244911
3139
a mi smo i dalje pokušavali otkriti
kako napraviti Mjesec.
kako napraviti Mjesec.
04:21
Then came the day
when I realized my mistake.
when I realized my mistake.
69
249932
3964
Zatim je došao dan
kada sam shvatila gdje sam pogriješila.
kada sam shvatila gdje sam pogriješila.
04:27
My student and I were looking at the data
from these fast-spinning giant impacts.
from these fast-spinning giant impacts.
70
255471
4939
Moj učenik i ja pregledavali smo podatke
tih velikih udara brze rotacije.
tih velikih udara brze rotacije.
04:32
On that day, we weren't actually
thinking about the Moon,
thinking about the Moon,
71
260434
2682
Toga dana nismo razmišljali o Mjesecu,
gledali smo planet.
04:35
we were looking at the planet.
72
263140
1655
04:36
The planet gets super-hot
and partially vaporized
and partially vaporized
73
264819
2539
Planet se ekstremno zagrije
i dijelom pretvori u plin
i dijelom pretvori u plin
od energije udara.
04:39
from the energy of the impact.
74
267382
2166
04:43
But the data didn't look like a planet.
75
271479
1998
Ali podaci nisu davali sliku planeta.
Izgledalo je čudno.
04:45
It looked really strange.
76
273501
1423
04:47
The planet was weirdly
connected to the disc.
connected to the disc.
77
275388
2397
Planet i prsten bili su spojeni
na čudan način.
na čudan način.
04:51
I got that super-excited feeling
78
279433
2787
Obuzeo me onaj intenzivan
osjećaj uzbuđenja,
osjećaj uzbuđenja,
04:54
when something really wrong
might be something really interesting.
might be something really interesting.
79
282244
3701
kad znate da bi nešto potpuno krivo
moglo biti nešto jako zanimljivo.
moglo biti nešto jako zanimljivo.
05:00
In all of my calculations,
80
288011
1328
U svim sam izračunima
05:01
I had assumed there was a planet
with a separate disc around it.
with a separate disc around it.
81
289363
3260
pretpostavila postojanje planeta
s odvojenim prstenom koji ga okružuje.
s odvojenim prstenom koji ga okružuje.
05:04
Calculating what was in the disc
was how we tested
was how we tested
82
292647
2425
Izračunima sastava prstena
testirali smo mogućnost
testirali smo mogućnost
da udarcem nastane Mjesec.
05:07
whether an impact could make the Moon.
83
295096
2401
05:10
But it didn't look that simple anymore.
84
298828
2178
Ali više nije bilo tako jednostavno.
05:15
We were making the mistake
85
303756
3083
Naša je pogreška bila
05:18
of thinking that a planet was always
going to look like a planet.
going to look like a planet.
86
306863
4281
što smo mislili da će planet
uvijek izgledati kao planet.
uvijek izgledati kao planet.
05:24
On that day, I knew that a giant impact
was making something completely new.
was making something completely new.
87
312190
6919
Toga dana, znala sam da je
velikim udarom nastalo nešto potpuno novo.
velikim udarom nastalo nešto potpuno novo.
05:33
I've had eureka moments.
88
321133
1826
Doživjela sam prije aha trenutke.
05:35
This was not one of them.
89
323655
1619
Ovo nije bio jedan od njih.
05:37
(Laughter)
90
325298
1167
(Smijeh)
05:38
I really didn't know what was going on.
91
326489
2913
Doista nisam shvaćala što se događa.
05:42
I had this strange, new object
in front of me
in front of me
92
330062
2152
Gledala sam u to čudno novo tijelo
i pokušavala ga shvatiti.
05:44
and the challenge
to try and figure it out.
to try and figure it out.
93
332238
2781
05:48
What do you do when faced
with the unknown?
with the unknown?
94
336473
2914
Što učiniti kad ste suočeni s nepoznatim?
05:52
How do you even start?
95
340054
1681
Odakle uopće početi?
05:55
We questioned everything:
96
343058
1769
Preispitivali smo sve:
05:57
What is a planet?
97
345400
1195
Što je planet?
U kojem trenutku planet više nije planet?
05:58
When is a planet no longer
a planet anymore?
a planet anymore?
98
346619
2304
06:01
We played with new ideas.
99
349320
2871
Igrali smo se novim idejama.
06:04
We had to get rid
of our old way of thinking,
of our old way of thinking,
100
352969
2184
Morali smo odbaciti
stari način razmišljanja,
stari način razmišljanja,
06:07
and by playing, I could
throw away all of the data,
throw away all of the data,
101
355177
3625
a igrajući se, mogla sam
odbaciti sve podatke,
odbaciti sve podatke,
06:10
all of the rules of the real world,
102
358826
1913
sva pravila stvarnog svijeta
06:12
and free my mind to explore.
103
360763
2285
i osloboditi um da istražuje.
06:16
And by making a mental space
104
364711
1926
Izgradivši mentalni prostor
06:19
where I could try out outrageous ideas
105
367501
2576
u kojem sam mogla ispitivati
nevjerojatne ideje
nevjerojatne ideje
06:23
and then bring them back
into the real world to test them,
into the real world to test them,
106
371233
3434
pa ih prenijeti u stvarni svijet
i testirati ih,
i testirati ih,
06:27
I could learn.
107
375331
1354
mogla sam učiti.
06:31
And by playing, we learned so much.
108
379423
2976
Igrajući se, toliko smo toga naučili.
06:34
I combined my lab experiments
with computer models
with computer models
109
382880
3458
Spojila sam laboratorijske eksperimente
s računalnim modelima
s računalnim modelima
06:38
and discovered that
after most giant impacts,
after most giant impacts,
110
386362
2582
i otkrila da je nakon većine velikih udara
06:40
the Earth is so hot, there's no surface.
111
388968
2162
Zemlja toliko vruća, da nema površine.
06:43
There's just a deep layer of gas
that gets denser and denser with depth.
that gets denser and denser with depth.
112
391154
3590
Postoji samo debeli sloj plina
koji s dubinom postaje sve gušći.
koji s dubinom postaje sve gušći.
06:47
The Earth would have been like Jupiter.
113
395289
2003
Zemlja je bila poput Jupitera.
06:49
There's nothing to stand on.
114
397316
1516
Bez čvrstog tla pod nogama.
06:52
And that was just part of the problem.
115
400373
2872
Ali to je bio samo dio problema.
06:55
I wanted to understand the whole problem.
116
403269
2374
Htjela sam potpuno razumjeti.
06:58
I couldn't let go of the challenge
to figure out what was really going on
to figure out what was really going on
117
406242
3911
Nisam mogla odustati
od izazova da otkrijem
od izazova da otkrijem
što se zaista dogodi
pri velikim udarima.
pri velikim udarima.
07:02
in giant impacts.
118
410177
1469
07:04
It took almost two years
119
412719
1591
Bile su potrebne gotovo dvije godine
07:07
of throwing away old ideas
120
415191
1790
odbacivanja starih rješenja
07:09
and building new ones
121
417733
1542
i stvaranja novih,
07:11
that we understood the data
122
419941
1884
da shvatimo podatke
07:14
and knew what it meant for the Moon.
123
422637
1809
i što to znači za Mjesec.
07:17
I discovered a new type
of astronomical object.
of astronomical object.
124
425811
4363
Otkrila sam novu vrstu nebeskog tijela.
07:23
It's not a planet.
125
431168
1419
Nije planet.
07:25
It's made from planets.
126
433087
1495
Nastalo je od planeta.
07:27
A planet is a body whose self-gravity
127
435733
2518
Planet je tijelo čija je gravitacija
07:30
is strong enough to give it
its rounded shape.
its rounded shape.
128
438275
2570
dovoljno snažna da mu daje okrugli oblik.
07:32
It spins around all together.
129
440869
1794
Sve zajedno rotira.
07:35
Make it hotter and spin it faster,
130
443415
2719
Ako mu povećavaš temperaturu
i brzinu rotacije,
i brzinu rotacije,
07:38
the equator gets bigger and bigger
until it reaches a tipping point.
until it reaches a tipping point.
131
446158
3813
ekvator raste do točke
u kojoj izgubi ravnotežu.
u kojoj izgubi ravnotežu.
07:42
Push past the tipping point,
132
450629
1642
Ako ustrajemo iza te točke,
07:44
and the material at the equator
spreads into a disc.
spreads into a disc.
133
452295
4097
materijal na ekvatoru raširi se u prsten.
07:48
It's now broken all the rules
of being a planet.
of being a planet.
134
456953
2769
Prekršena su sva pravila
kojima definiramo planet.
kojima definiramo planet.
07:52
It can't spin around together anymore,
135
460215
2395
Ne može više rotirati zajedno,
07:54
its shape keeps changing
as it gets bigger and bigger;
as it gets bigger and bigger;
136
462634
2661
kako raste i raste, oblik mu se mijenja;
07:57
the planet has become something new.
137
465319
1967
planet preraste u nešto novo.
08:00
We gave our discovery its name:
138
468771
2910
Svom smo otkriću dali ime:
08:04
synestia.
139
472610
1323
sinestija.
08:06
We named it after the goddess Hestia,
140
474402
2182
Nazvali smo ga po božici Hestiji,
08:08
the Greek goddess of the hearth and home,
141
476608
2306
grčkoj božici ognjišta i doma,
08:10
because we think the Earth became one.
142
478938
2282
jer smatramo da je Zemlja
postala upravo to.
postala upravo to.
08:13
The prefix means "all together,"
143
481244
1551
Prefiks ima značenje "zajedno",
08:14
to emphasize the connection
between all of the material.
between all of the material.
144
482819
2797
naglašava poveznicu čitavog materijala.
08:18
A synestia is what a planet becomes
145
486640
3202
Planet postane sinestija
kad ga temperatura i rotacija
kad ga temperatura i rotacija
08:21
when heat and spin push it over the limit
of a spheroidal shape.
of a spheroidal shape.
146
489866
4450
izguraju izvan granica
sferoidnog oblika.
sferoidnog oblika.
08:27
Would you like to see a synestia?
147
495691
2490
Želite li vidjeti sinestiju?
08:30
(Cheers)
148
498205
2039
(Klicanje)
08:33
In this visualization
of one of my simulations,
of one of my simulations,
149
501554
3932
Na ovom prikazu jedne od mojih simulacija,
08:37
the young Earth is already spinning
quickly from a previous giant impact.
quickly from a previous giant impact.
150
505510
4294
mlada Zemlja već rotira brzo
zbog prethodnog velikog udara.
zbog prethodnog velikog udara.
08:42
Its shape is deformed, but our planet
would be recognizable
would be recognizable
151
510663
3236
Oblik joj je deformiran,
ali moguće ju je prepoznati
ali moguće ju je prepoznati
08:45
by the water on its surface.
152
513923
1906
po vodi na njenoj površini.
08:48
The energy from the impact
vaporizes the surface,
vaporizes the surface,
153
516692
3857
Energija udara pretvara u plin
površinu, vodu, atmosferu
08:52
the water, the atmosphere,
154
520573
1522
08:54
and mixes all of the gases together
in just a few hours.
in just a few hours.
155
522119
3923
i izmiješa sve plinove
za samo nekoliko sati.
za samo nekoliko sati.
08:59
We discovered that many
giant impacts make synestias,
giant impacts make synestias,
156
527414
3619
Otkrili smo da mnogi veliki udari
stvaraju sinestije,
stvaraju sinestije,
09:03
but these burning, bright objects
don't live very long.
don't live very long.
157
531566
2977
ali ova sjajna užarena tijela
ne opstaju dugo.
ne opstaju dugo.
09:06
They cool down, shrink
and turn back into planets.
and turn back into planets.
158
534567
3536
Ohlade se, stisnu
i ponovno postanu planeti.
i ponovno postanu planeti.
09:11
While rocky planets
like Earth were growing,
like Earth were growing,
159
539266
2423
Dok nastaju,
stjenoviti planeti kao Zemlja
stjenoviti planeti kao Zemlja
09:13
they probably turned into synestias
one or more times.
one or more times.
160
541713
3526
vjerojatno se barem jednom
pretvore u sinestiju.
pretvore u sinestiju.
09:19
A synestia gives us a new way to solve
the problem of the origin of the Moon.
the problem of the origin of the Moon.
161
547338
5740
Sinestija nam pruža novo rješenje
za problem postanka Mjeseca.
za problem postanka Mjeseca.
09:26
We propose that the Moon formed
inside a huge, vaporous synestia.
inside a huge, vaporous synestia.
162
554821
6915
Mi predlažemo da je Mjesec nastao
unutar ogromne plinovite sinestije.
unutar ogromne plinovite sinestije.
09:34
The Moon grew from magma rain
163
562285
3070
Nastao je iz kiše magme,
09:37
that condensed out of the rock vapor.
164
565379
2415
nastale kondenzacijom
vaporiziranih stijena.
vaporiziranih stijena.
09:41
The Moon's special connection to Earth
165
569198
2289
Zemlja i Mjesec posebno su povezani
09:43
is because the Moon formed
inside the Earth
inside the Earth
166
571511
2766
jer je Mjesec nastao unutar Zemlje
dok je Zemlja bila sinestija.
09:46
when Earth was a synestia.
167
574301
1880
09:49
The Moon could have orbited
inside the synestia for years,
inside the synestia for years,
168
577457
4286
Mjesec je mogao godinama
orbitirati unutar sinestije,
orbitirati unutar sinestije,
skriven.
09:53
hidden from view.
169
581767
1617
09:56
The Moon is revealed by the synestia
cooling and shrinking
cooling and shrinking
170
584622
4908
Otkrilo ga je sinestijino
hlađenje i stiskanje
hlađenje i stiskanje
unutar vlastite orbite.
10:01
inside of its orbit.
171
589554
1895
10:06
The synestia turns into planet Earth
172
594652
2593
Sinestija postaje planet Zemlja
10:09
only after cooling
for hundreds of years longer.
for hundreds of years longer.
173
597269
3414
tek nakon stotina godina hlađenja.
10:14
In our new theory,
174
602990
1804
Po našoj novoj teoriji,
10:16
the giant impact makes a synestia,
175
604818
2810
velikim udarom nastala je sinestija
10:19
and the synestia divides
into two new bodies,
into two new bodies,
176
607652
3645
koja se razdijelila u dva nova tijela,
10:23
creating our isotopically
identical Earth and Moon.
identical Earth and Moon.
177
611321
4734
stvorivši izotopski identične
Zemlju i Mjesec.
Zemlju i Mjesec.
10:29
Synestias have been created
throughout the universe.
throughout the universe.
178
617420
3717
Sinestije su nastajale
po čitavom svemiru.
po čitavom svemiru.
10:34
And we only just realized that
by finding them in our imagination:
by finding them in our imagination:
179
622574
5581
Shvatili smo to tek sada,
pronašavši ih u našoj mašti.
pronašavši ih u našoj mašti.
10:40
What else am I missing
in the world around me?
in the world around me?
180
628179
4903
Što mi je još promaklo
u svijetu koji me okružuje?
u svijetu koji me okružuje?
10:45
What is hidden from my view
by my own assumptions?
by my own assumptions?
181
633106
3772
Što još ne vidim
zbog vlastitih pretpostavki?
zbog vlastitih pretpostavki?
10:51
The next time you look at the Moon,
182
639371
2294
Kada sljedeći put pogledate u Mjesec,
10:53
remember:
183
641689
1659
sjetite se:
10:55
the things you think you know
184
643372
1832
ono što mislite da znate
može biti prilika da otkrijete
nešto stvarno nevjerojatno.
nešto stvarno nevjerojatno.
10:58
may be the opportunity to discover
something truly amazing.
something truly amazing.
185
646320
4459
11:05
(Applause)
186
653167
4380
(Pljesak)
ABOUT THE SPEAKER
Sarah T. Stewart - Planetary scientistSarah T. Stewart specializes in the study of collisions in the solar system.
Why you should listen
Sarah T. Stewart has been a Professor in the Department of Earth and Planetary Sciences at UC Davis since 2014, following 11 years as a Professor at Harvard University. A planetary scientist and MacArthur Fellow, she specializes in the study of collisions in the solar system and directs the Shock Compression Laboratory, which uses light gas guns to study shock waves in planetary materials. Stewart is best known for proposing a new model for the origin of the Moon, and she is dedicated to public outreach in the planetary sciences.
Sarah T. Stewart | Speaker | TED.com