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  • I thought I would think about changing your perspective on the world a bit,

    譯者: K. C. Peng 審譯者: Benjamin Chiang

  • and showing you some of the designs that we have in nature.

    我想要對大家的世界觀做一點點改變

  • And so, I have my first slide to talk about

    也帶你看看自然的設計

  • the dawning of the universe and what I call

    由此, 第一頁 是為了說明

  • the cosmic scene investigation, that is, looking at

    我所謂的 宇宙的曙光

  • the relics of creation and inferring what happened at the beginning,

    宇宙學的偵查現場 也就是 觀察

  • and then following it up and trying to understand it.

    創世後的物體 來推論宇宙之生成與發展

  • And so one of the questions that I asked you is,

    跟隨現象 再試圖了解

  • when you look around, what do you see?

    所以 第一個想問的問題就是

  • Well, you see this space that's created by designers

    你的四週 你看到什麼?

  • and by the work of people, but what you actually see

    你可能見到這個充滿設計的空間

  • is a lot of material that was already here,

    都是人工作成 但你真的見到的是

  • being reshaped in a certain form.

    都是早就存在的物質

  • And so the question is: how did that material get here?

    只不過是被重組成不同型態

  • How did it get into the form that it had before it got reshaped, and so forth?

    所以問題是 這些物質是哪來的?

  • It's a question of what's the continuity?

    這些物質的前身 又是如何呢?

  • So one of the things I look at is,

    這就是什麼是連續性?

  • how did the universe begin and shape?

    所以我研究的其中之一

  • What was the whole process in the creation and the evolution of the universe

    就是宇宙是如何誕生 以及如何形塑到今?

  • to getting to the point that we have these kinds of materials?

    到底什麼是誕生的過程,以及如何演化到

  • So that's sort of the part, and let me move on then and show you

    現在的物質狀態?

  • the Hubble Ultra Deep Field.

    這就是部分簡介 就讓我繼續告訴你們有關

  • If you look at this picture,

    哈柏超深景太空望遠鏡

  • what you will see is a lot of dark with some light objects in it.

    這張照片

  • And everything but -- four of these light objects are stars,

    顯示大部分的黑暗 與 一些明亮物體

  • and you can see them there -- little pluses.

    其中四個是恆星

  • This is a star, this is a star, everything else is a galaxy, OK?

    也可以看到那小小的光芒

  • So there's a couple of thousand galaxies

    這是恆星,這也是,其他都是銀河

  • you can see easily with your eye in here.

    所以有數以千計的銀河

  • And when I look out at particularly this galaxy,

    可以很明顯的看到

  • which looks a lot like ours, I wonder if there's

    就讓我選個.. 這個銀河

  • an art design college conference going on,

    看起來很像我們的,我便好奇

  • and intelligent beings there are thinking about, you know,

    那裡是否也有個藝術設計學院的會議正在進行?

  • what designs they might do, and there might be a few cosmologists

    是否有高等智慧生命在想事情

  • trying to understand where the universe itself came from,

    他們在做怎樣的設計 或許也有一些宇宙論家

  • and there might even be some in that galaxy looking at ours

    在探討這個宇宙是如何產生的

  • trying to figure out what's going on over here.

    甚至可能有生命從這銀河 觀望我們

  • But there's a lot of other galaxies, and some are nearby,

    也想知道我們在做什麼

  • and they're kind of the color of the Sun,

    但是 還有著其他許多的銀河 有些在附近

  • and some are further away and they're a little bluer, and so forth.

    有著太陽般的光色

  • But one of the questions is -- this should be, to you --

    有的較遠些的就帶著較藍的光色

  • how come there are so many galaxies?

    那你們應該就有著一個問題

  • Because this represents a very clean fraction of the sky.

    怎麼會有這麼多的銀河呢?

  • This is only 1,000 galaxies.

    這張代表的是一部分相當清楚的天空

  • We think there's on the order -- visible to the Hubble Space Telescope,

    就有著1000個銀河

  • if you had the time to scan it around --

    我們估算 假設以哈柏太空望遠鏡的解析度

  • about 100 billion galaxies. Right?

    做全方位角的掃描

  • It's a very large number of galaxies.

    會有1000億個銀河

  • And that's roughly how many stars there are in our own galaxy.

    是個非常大的數字

  • But when you look at some of these regions like this, you'll see

    也約等於我們這個銀河有的星球數量

  • more galaxies than stars, which is kind of a conundrum.

    但再看到一些像這樣的區域

  • So the question should come to your mind is, what kind of design, you know,

    銀河數量卻多於星星數目,這倒是個謎題

  • what kind of creative process and what kind of design

    所以冒出來的問題就是,到底是怎樣的設計?

  • produced the world like that?

    怎樣的創造過程和設計

  • And then I'm going to show you it's actually a lot more complicated.

    造成現今的世界?

  • We're going to try and follow it up.

    所以我得告訴各位 這些是更更複雜的

  • We have a tool that actually helps us out in this study,

    就讓我們一起繼續

  • and that's the fact that the universe is so incredibly big

    我們有一工具幫助我們研究

  • that it's a time machine, in a certain sense.

    也是因為這個宇宙是如此的龐大

  • We draw this set of nested spheres cut away so you see it.

    就某種意義而言,就好像是個時光機器

  • Put the Earth at the center of the nested spheres,

    我們以這剖開的星球網圖做說明

  • just because that's where we're making observations.

    以地球為星球網絡的中心

  • And the moon is only two seconds away, so if you take a picture of the moon

    就只是這裡是我們的觀察點

  • using ordinary light, it's the moon two seconds ago, and who cares.

    所以月球離我們2秒遠, 意思是當你對月球照相

  • Two seconds is like the present.

    你得到的是2秒前的月球 沒差嘛!

  • The Sun is eight minutes ago. That's not such a big deal, right,

    2秒的差異幾乎就算是同時吧

  • unless there's solar flares coming then you want to get out the way.

    太陽是8秒遠 也沒什麼不同 不是嗎?

  • You'd like to have a little advance warning.

    除非 太陽輻射風暴發生 我們想躲避

  • But you get out to Jupiter and it's 40 minutes away. It's a problem.

    就需要有足夠時間的警告

  • You hear about Mars, it's a problem communicating to Mars

    那木星呢 是40分鐘之遠 開始知道問題了

  • because it takes light long enough to go there.

    就連對火星的通訊都可以是個問題

  • But if you look out to the nearest set of stars,

    因為就連光速傳遞也要好一會兒

  • to the nearest 40 or 50 stars, it's about 10 years.

    在看到那些附近的星團

  • So if you take a picture of what's going on, it's 10 years ago.

    最近的40 50 顆 也要10年傳遞

  • But you go and look to the center of the galaxy,

    現在照張相 得到的是10年前的鄰近星球

  • it's thousands of years ago.

    再到我們銀河的中央部份

  • If you look at Andromeda, which is the nearest big galaxy,

    那是好幾百光年之遙

  • and it's two million years ago.

    看看最近的仙女座銀河

  • If you took a picture of the Earth two million years ago,

    也要200萬光年

  • there'd be no evidence of humans at all,

    想像你照張200萬年前的地球

  • because we don't think there were humans yet.

    根本就還沒有人類

  • I mean, it just gives you the scale.

    是因為我們人類尚未出現

  • With the Hubble Space Telescope, we're looking at

    我只想給各位這樣的空間與時間概念

  • hundreds of millions of years to a billion years.

    哈柏太空望遠鏡所看到的

  • But if we were capable to come up with an idea of how to look even further --

    都是1~10億光年之遙的空間與時間

  • there's some things even further,

    如果我們能想出個方法 看到更遙遠的空間

  • and that was what I did in a lot of my work,

    而且總是有更遙遠的

  • was to develop the techniques -- we could look out back to even earlier

    那就是我大部分的工作

  • epochs before there were stars and before there were galaxies,

    發展這樣的技術--我們甚至能看到更早

  • back to when the universe was hot and dense and very different.

    且早於星星與銀河生成前

  • And so that's the sort of sequence,

    能回到宇宙還是又熱又稠密,與現在大不相同的時候

  • and so I have a more artistic impression of this.

    這就是宇宙的故事

  • There's the galaxy in the middle, which is the Milky Way,

    我也有個更具藝術表達的呈現

  • and around that are the Hubble -- you know, nearby kind of galaxies,

    中央是個銀河 就是我們的銀河系

  • and there's a sphere that marks the different times.

    再來是附近的銀河

  • And behind that are some more modern galaxies.

    用球面刻畫著不同的時間距離

  • You see the whole big picture?

    在那之後是更現代的銀河

  • The beginning of time is funny -- it's on the outside, right?

    能了解這整個概念嗎?

  • And then there's a part of the universe we can't see

    有趣的是 最早的時間是在外面

  • because it's so dense and so hot, light can't escape.

    另外是 有部分的宇宙是我們看不到的

  • It's like you can't see to the center of the Sun;

    因為它們是如此的高密度與高能量, 光線不能脫離其重力場

  • you have to use other techniques to know what's going on inside the Sun.

    打類比是 你不能看到太陽的中心

  • But you can see the edge of the Sun,

    要用其他的技術來明白太陽中心是什麼

  • and the universe gets that way, and you can see that.

    所以 只能看到太陽表面

  • And then you see this sort of model area around the outside,

    宇宙觀測 也是類似道理

  • and that is the radiation coming from the Big Bang,

    也能以模型理論推論出外面的情況

  • which is actually incredibly uniform.

    這是 來自於 宇宙初生成的大爆炸 的輻射線

  • The universe is almost a perfect sphere,

    是相當的整齊

  • but there are these very tiny variations

    宇宙是個相當完美的球體

  • which we show here in great exaggeration.

    但也有著一些小小的變化

  • And from them in the time sequence we're going to have to go

    我們將之誇大處理

  • from these tiny variations to these irregular galaxies and first stars

    從時間序列 我們會

  • to these more advanced galaxies, and eventually the solar system, and so forth.

    經由這些小小變化到不規則星系,還有最初的星球

  • So it's a big design job,

    到更進化的星系 最後帶到像太陽系統 等等

  • but we'll see about how things are going on.

    所以是一個 設計鉅作

  • So the way these measurements were done,

    但讓我們是著了解看看

  • there's been a set of satellites, and this is where you get to see.

    所以這就是時空的測量的方法

  • So there was the COBE satellite, which was launched in 1989,

    利用好幾個人造衛星 看這裡

  • and we discovered these variations.

    這是 COBE人造衛星 1989年升空

  • And then in 2000, the MAP satellite was launched -- the WMAP --

    由它 我們找到這些變異

  • and it made somewhat better pictures.

    2000年 MAP人造衛星升空 就是 WMAP

  • And later this year -- this is the cool stealth version,

    得到較清晰的照片

  • the one that actually has some beautiful design features to it,

    那年尾 有這極棒的隱形版本

  • and you should look -- the Planck satellite will be launched,

    它其實有極佳的設計概念

  • and it will make very high-resolution maps.

    可再進一步了解 接著 Planck 人造衛星即將升空

  • And that will be the sequence of understanding

    它能擷取高解析度的星空地圖

  • the very beginning of the universe.

    會帶來後續深入

  • And what we saw was, we saw these variations, and then they told us

    對宇宙生成的了解

  • the secrets, both about the structure of space-time,

    所以 我們藉由觀察這些變異 而顯示些秘密

  • and about the contents of the universe,

    關於時空架構的秘密

  • and about how the universe started in its original motions.

    也揭露了宇宙的組成物

  • So we have this picture, which is quite a spectacular picture,

    以及宇宙是如何開始最初的運動

  • and I'll come back to the beginning, where we're going to have

    所以我們有了這想像,是個令人驚歎的想像

  • some mysterious process that kicks the universe off at the beginning.

    待會再回到宇宙之最初 我們會有

  • And we go through a period of accelerating expansion, and the universe

    些神秘的程序 讓宇宙開始運轉

  • expands and cools until it gets to the point where it becomes transparent,

    宇宙經過了一段 加速膨脹過程

  • then to the Dark Ages, and then the first stars turn on,

    因膨脹而逐漸冷卻 直到它變成透明

  • and they evolve into galaxies, and then later they get to the more expansive galaxies.

    就是黑暗期 接著最初的星球誕生

  • And somewhere around this period is when our solar system started forming.

    這些星球再演化成星系 之後再聚集成重量級星系

  • And it's maturing up to the present time.

    就差不多是此階段 我們的太陽系也開始形成

  • And there's some spectacular things.

    成熟發展到如今

  • And this wastebasket part, that's to represent

    其中有些奇妙的事情

  • what the structure of space-time itself is doing during this period.

    用這垃圾桶型來說明

  • And so this is a pretty weird model, right?

    時空的架構 以及 時空自己各階段的變化

  • What kind of evidence do we have for that?

    所以這看起來是個怪異的模型, 嗯?

  • So let me show you some of nature's patterns

    我們又有哪些證據顯示這樣的作法呢?

  • that are the result of this.

    容我解說 一些自然的法則

  • I always think of space-time as being the real substance of space,

    以及所導致的結果

  • and the galaxies and the stars just like the foam on the ocean.

    我總認為 時空 才是太空的基本組成

  • It's a marker of where the interesting waves are and whatever went on.

    而星系與星球 就像是海洋漂浮的泡沫

  • So here is the Sloan Digital Sky Survey showing the location of a million galaxies.

    是有趣的波前記號 也串出進行方式

  • So there's a dot on here for every galaxy.

    這是Sloan數位天空調查 顯示了100萬個星系的座標

  • They go out and point a telescope at the sky, take a picture,

    每個星系以一個點代表

  • identify what are stars and throw them away, look at the galaxies,

    他們到野外用望遠鏡指向天空 照張相

  • estimate how far away they are, and plot them up.

    確認是恆星 就忽略 只關注星系

  • And just put radially they're going out that way.

    估計它們的距離 畫下它們

  • And you see these structures, this thing we call the Great Wall,

    所以是以放射狀的進行

  • but there are voids and those kinds of stuff, and they kind of fade out

    這些結構 我們稱之為 "長城"

  • because the telescope isn't sensitive enough to do it.

    也看到一些空缺 有些結構似乎於邊緣消失

  • Now I'm going to show you this in 3D.

    是因為 望遠鏡不夠靈敏完成判斷

  • What happens is, you take pictures

    現在 我要將之轉成 3-D呈現

  • as the Earth rotates, you get a fan across the sky.

    結果是 照相時

  • There are some places you can't look because of our own galaxy,

    隨著地球自轉 可以做扇型的涵蓋天空

  • or because there are no telescopes available to do it.

    但有些立體角是無效的 因為被自己的銀河系所干擾與阻擋

  • So the next picture shows you the three-dimensional version of this rotating around.

    或因為沒有望遠鏡能偵測

  • Do you see the fan-like scans made across the sky?

    所以下張圖 就是旋轉呈現3-D星系地圖

  • Remember, every spot on here is a galaxy, and you see the galaxies,

    有看到橫跨天空的扇型掃描嗎?

  • you know, sort of in our neighborhood, and you sort of see the structure.

    請記得 每一點代表一個銀河

  • And you see this thing we call the Great Wall,

    由銀河點 可約略看出結構

  • and you see the complicated structure, and you see these voids.

    所以還是可以看到 這些被稱為"長城"的

  • There are places where there are no galaxies and there are places

    也看到 複雜處 也看到空缺處

  • where there are thousands of galaxies clumped together, right.

    看到 有些部分沒有任何星系

  • So there's an interesting pattern,

    也有些部分聚集過多星系 對吧!

  • but we don't have enough data here to actually see the pattern.

    所以是個有趣的結構

  • We only have a million galaxies, right?

    還沒有足夠的資料可看出全貌

  • So we're keeping, like, a million balls in the air

    這裡只是100萬個星系 不是嗎?

  • but, what's going on?

    好像我們在空中有100萬個球

  • There's another survey which is very similar to this,

    到底發生了什麼?

  • called the Two-degree Field of View Galaxy Redshift Survey.

    另有一個類似的調查

  • Now we're going to fly through it at warp a million.

    叫做 2維星系紅位移調查

  • And every time there's a galaxy -- at its location there's a galaxy --

    現在要飛過這些星系

  • and if we know anything about the galaxy, which we do,

    每經過一個星系 便標出個星系

  • because there's a redshift measurement and everything,

    我們真的能確定它是個星系

  • you put in the type of galaxy and the color,

    因為紅位移光譜測量 及其他事證

  • so this is the real representation.

    標出星系種類及其顏色

  • And when you're in the middle of the galaxies

    這就是這樣的呈現

  • it's hard to see the pattern; it's like being in the middle of life.

    當你在星系中

  • It's hard to see the pattern in the middle of the audience,

    是很難察覺結構 就像處於生活中

  • it's hard to see the pattern of this.

    身處於觀眾中 是非常難看出結構

  • So we're going to go out and swing around and look back at this.

    這樣是很難看出結構的

  • And you'll see, first, the structure of the survey,

    我們得利用模型 讓我們飛出之外 再 遠觀

  • and then you'll start seeing the structure of the galaxies

    會看出這樣調查的結構

  • that we see out there.

    會看出星系的結構

  • So again, you can see the extension of this Great Wall of galaxies showing up here.

    要從遠處看

  • But you can see the voids,

    再一次 你可以看到 星系"長城"的延伸 到這裡

  • you can see the complicated structure, and you say,

    但你也可以看到空缺

  • well, how did this happen?

    也看到複雜結構

  • Suppose you're the cosmic designer.

    你接著問 是怎們形成的?

  • How are you going to put galaxies out there in a pattern like that?

    假設你是宇宙的設計者

  • It's not just throwing them out at random.

    是怎麼讓星系做成這樣的結構?

  • There's a more complicated process going on here.

    是隨機扔出去嗎?

  • How are you going to end up doing that?

    其實是有個更複雜的過程的

  • And so now we're in for some serious play.

    你要如何做到呢?

  • That is, we have to seriously play God,

    這就是"認真發揮" 的過程了

  • not just change people's lives, but make the universe, right.

    就是 我們要 認真地扮演是 神

  • So if that's your responsibility, how are you going to do that?

    不只是改變人們的生與死 也要創造宇宙

  • What's the kind of technique?

    若那是你的責任 你要怎麼做?

  • What's the kind of thing you're going to do?

    又是怎麼的技巧呢?

  • So I'm going to show you the results of a very large-scale simulation

    又是哪些事你想去做?

  • of what we think the universe might be like, using, essentially,

    我要展示的是一個非常大尺度的模擬

  • some of the play principles and some of the design principles that,

    驗證我們假設的宇宙演化 利用的

  • you know, humans have labored so hard to pick up,

    只是一些 簡單原理 與 設計原理

  • but apparently nature knew how to do at the beginning.

    都是過去人類共同得到的原理

  • And that is, you start out with very simple ingredients

    只是宇宙一開始就順著這些原理

  • and some simple rules,

    模擬就是一些簡單的組成

  • but you have to have enough ingredients to make it complicated.

    與一些簡單的原理

  • And then you put in some randomness,

    但你得有足夠的組成物 來複雜化

  • some fluctuations and some randomness,

    再放進些隨機特性

  • and realize a whole bunch of different representations.

    一些擾動 再一些隨機亂數

  • So what I'm going to do is show you

    再試著理解這整組所代表的結果

  • the distribution of matter as a function of scales.

    接下來就是要讓你們看

  • We're going to zoom in, but this is a plot of what it is.

    物體的分佈 是尺度的函數

  • And we had to add one more thing to make the universe come out right.

    我們來放大拉近 這就是其中的一個圖示

  • It's called dark matter.

    我們必須加一樣東西 才能得出較正常的結果

  • That is matter that doesn't interact with light

    就是黑暗物質

  • the typical way that ordinary matter does,

    這種物體不與光反應

  • the way the light's shining on me or on the stage.

    通常一般物體都會

  • It's transparent to light, but in order for you to see it,

    反射光線 就像現在舞台上與我身上的反射光

  • we're going to make it white. OK?

    黑暗物質對光而言是透明的 為了讓大家了解

  • So the stuff that's in this picture that's white, that is the dark matter.

    我們將它們暫設為白色顯示

  • It should be called invisible matter,

    所以模擬中白色物體 就是黑暗物體

  • but the dark matter we've made visible.

    應該被稱為 隱形物體

  • And the stuff that is in the yellow color,

    只是在模型顯示上 我們將它們設成可見

  • that is the ordinary kind of matter that's turned into stars and galaxies.

    而黃色部分

  • So I'll show you the next movie.

    就代表一般的物體 可以是恆星與星系

  • So this -- we're going to zoom in.

    我會展示一動畫電影

  • Notice this pattern and pay attention to this pattern.

    這樣 -- 我們會拉近放大

  • We're going to zoom in and zoom in.

    注意結構變化

  • And you'll see there are all these filaments and structures and voids.

    放大再放大

  • And when a number of filaments come together in a knot,

    你可以看到這些長絲 結構 與 空缺

  • that makes a supercluster of galaxies.

    當數個長絲 纏成 結

  • This one we're zooming in on

    就成了 超大巨集的星系

  • is somewhere between 100,000 and a million galaxies in that small region.

    這個再繼續拉近

  • So we live in the boonies.

    在畫面中那小區域內 有著 10~100萬 的星系

  • We don't live in the center of the solar system,

    我們存在某個角落

  • we don't live in the center of the galaxy

    並不是太陽系的中央

  • and our galaxy's not in the center of the cluster.

    也不是銀河系的中央

  • So we're zooming in.

    而銀河系 也不是在所有星系的中央

  • This is a region which probably has more than 100,000,

    所以我們再拉近

  • on the order of a million galaxies in that region.

    這是個有著10~100萬個

  • We're going to keep zooming in. OK.

    星系的小區域

  • And so I forgot to tell you the scale.

    我們會持續放大拉近

  • A parsec is 3.26 light years.

    我忘了說明這個尺度

  • So a gigaparsec is three billion light years -- that's the scale.

    每一秒差是 3.26光年

  • So it takes light three billion years to travel over that distance.

    每一百萬秒差 就是30億光年 --- 這就是模擬尺度

  • Now we're into a distance sort of between here and here.

    就是光線要用30億年才能穿過那距離

  • That's the distance between us and Andromeda, right?

    我們現在的距離 大約是這裡和這裡之間

  • These little specks that you're seeing in here, they're galaxies.

    也就是我們距離仙女座星系的距離

  • Now we're going to zoom back out,

    這些小小的雜點 都是星系

  • and you can see this structure that,

    目前是退出拉遠

  • when we get very far out, looks very regular,

    便能看出個結構

  • but it's made up of a lot of irregular variations.

    當我們非常遠觀時 看起來是非常規則

  • So they're simple building blocks.

    但這是由許多的不規則變異所構成

  • There's a very simple fluid to begin with.

    所以 這些就是簡單的模型組件

  • It's got dark matter, it's got ordinary matter,

    都是些簡單的成份開始

  • it's got photons and it's got neutrinos,

    要有黑暗物體 一般物體

  • which don't play much role in the later part of the universe.

    要有光子 微中子

  • And it's just a simple fluid and it, over time,

    微中子 是沒有太多角色在後期宇宙發展中

  • develops into this complicated structure.

    就是個簡單的流動 隨時間

  • And so you know when you first saw this picture,

    而發展成複雜的結構

  • it didn't mean quite so much to you.

    當第一次看到這景象

  • Here you're looking across one percent of the volume of the visible universe

    對你們而言 可能沒有太多道理

  • and you're seeing billions of galaxies, right, and nodes,

    這裡顯示的只是1%的可見宇宙

  • but you realize they're not even the main structure.

    有著10億個星系

  • There's a framework, which is the dark matter, the invisible matter,

    但我們還不在主要結構

  • that's out there that's actually holding it all together.

    模擬架構 顯示 需要這種黑暗隱形物體

  • So let's fly through it, and you can see how much harder it is

    才能將一切保持住這樣發展

  • when you're in the middle of something to figure this out.

    再飛入其中 就會明白

  • So here's that same end result.

    身處其中是如何難理解整個狀況

  • You see a filament,

    所以這是相同結果

  • you see the light is the invisible matter,

    有細絲

  • and the yellow is the stars or the galaxies showing up.

    白色代表是黑暗物體

  • And we're going to fly around, and we'll fly around,

    黃色是恆星與星系

  • and you'll see occasionally a couple of filaments intersect,

    再飛繞過四周

  • and you get a large cluster of galaxies.

    會看到一些細絲相交錯

  • And then we'll fly in to where the very large cluster is,

    那是大巨集的星系

  • and you can see what it looks like.

    再進入這些巨集星系

  • And so from inside, it doesn't look very complicated, right?

    看看是什麼樣子

  • It's only when you look at it at a very large scale,

    所以從裡面 一點也不複雜 對吧?

  • and explore it and so forth, you realize it's a very intricate,

    唯有當你 以大尺度觀看時

  • complicated kind of a design, right?

    才能明白它的複雜

  • And it's grown up in some kind of way.

    是種複雜的設計 對吧?

  • So the question is,

    某種的長成方式

  • how hard would it be to assemble this, right?

    所以問題是

  • How big a contractor team would you need

    是多麼困難來組合成這個?

  • to put this universe together, right?

    需要多大的能力

  • That's the issue, right?

    才能做出這樣的宇宙?

  • And so here we are.

    這是問題吧!

  • You see how the filament --

    就來試試

  • you see how several filaments are coming together,

    可以看到細絲

  • therefore making this supercluster of galaxies.

    與好幾個細絲是如何連在一起

  • And you have to understand, this is not how it would actually look

    才做出這樣的超巨集星系

  • if you -- first, you can't travel this fast,

    但是得指出 這並非真的是所見到的

  • everything would be distorted,

    .

  • but this is using simple rendering and graphic arts kind of stuff.

    所有東西會被扭曲

  • This is how, if you took billions of years to go around,

    這裡只是用繪圖工具做視覺呈現

  • it might look to you, right?

    這是利用時間快轉的模擬

  • And if you could see invisible matter, too.

    才能察覺

  • And so the idea is, you know, how would you put together the universe

    也是要能看見這些黑暗物體

  • in a very simple way?

    概念是要問 怎麼將宇宙放在一起

  • We're going to start and realize that the entire visible universe,

    又是有一簡單的原理呢?

  • everything we can see in every direction with the Hubble Space Telescope

    我們就即將能明白這整個可見宇宙

  • plus our other instruments,

    驗證哈柏太空望遠鏡及其他儀器

  • was once in a region that was smaller than an atom.

    所見的所有角度

  • It started with tiny quantum mechanical fluctuations,

    最先的開始只是小於 一個小小的原子

  • but expanding at a tremendous rate.

    來自於量子力學的擾動

  • And those fluctuations

    卻是以極速的膨脹

  • were stretched to astronomical sizes, and those fluctuations

    這些擾動

  • eventually are the things we see in the cosmic microwave background.

    擴展到天文級的尺寸大小 這些擾動

  • And then we needed some way to turn those fluctuations into galaxies

    最終成為我們所見的宇宙背景輻射

  • and clusters of galaxies and make these kinds of structures go on.

    我們需要能把擾動的輻射能量變成星系

  • So I'm going to show you a smaller simulation.

    與巨集星系 並使這些結構繼續

  • This simulation was run on 1,000 processors for a month

    所以我將呈現一個小模擬

  • in order to make just this simple visible one.

    這樣看似簡單的模擬 使用了1000個處理器

  • So I'm going to show you one

    還是需要耗時一個月

  • that can be run on a desktop in two days in the next picture.

    現在呈現的是

  • So you start out with teeny fluctuations

    用桌上型電腦跑了兩天的結果

  • when the universe was at this point,

    開始小小擾動

  • now four times smaller, and so forth.

    使得宇宙變小了

  • And you start seeing these networks, this cosmic web of structure forming.

    四倍 等等

  • And this is a simple one, because it doesn't have the ordinary matter

    便可以見到這些網絡 宇宙的網絡結構開始成型

  • and it just has the dark matter in it.

    這是個簡易版本 並沒有一般物體

  • And you see how the dark matter lumps up,

    只用了較重的黑暗物體

  • and the ordinary matter just trails along behind.

    可以看到黑暗物體開始結團成塊

  • So there it is.

    一般物體就也會緊隨著之後開展

  • At the beginning it's very uniform.

    就是這樣

  • The fluctuations are a part in 100,000.

    一開始是非常的均勻

  • There are a few peaks that are a part in 10,000,

    十萬分之一的擾動

  • and then over billions of years, gravity just pulls in.

    也有些是萬分之一的擾動

  • This is light over density, pulls the material around in.

    過了數十億年 重力吸引力才有作用顯現

  • That pulls in more material and pulls in more material.

    這是因密度夠大 而能將物體拉入

  • But the distances on the universe are so large

    因吸引力集結 再集結

  • and the time scales are so large that it takes a long time for this to form.

    宇宙之間的距離是如此之大

  • And it keeps forming until the universe is roughly about half the size it is now,

    時間是如此之長 所以是需要非常長的時間才能形成

  • in terms of its expansion.

    宇宙持續發展 就膨脹進行而言

  • And at that point, the universe mysteriously starts accelerating

    直到是目前½的大小的時候

  • its expansion and cuts off the formation of larger-scale structure.

    宇宙神奇的開始了加速膨脹

  • So we're just seeing as large a scale structure as we can see,

    這樣的膨脹 破開了較大的結構

  • and then only things that have started forming already

    看到目前的能看到的最大結構

  • are going to form, and then from then on it's going to go on.

    就只有那些已經開始形成的

  • So we're able to do the simulation, but this is two days on a desktop.

    會再從那時間點 繼續發展

  • We need, you know, 30 days on 1,000 processors

    這只是兩天的電腦簡化版運算

  • to do the kind of simulation that I showed you before.

    我們需要1000 個CPU的30天運算

  • So we have an idea of how to play seriously, creating the universe

    才能展現先前的結果

  • by starting with essentially less than an eyedrop full of material,

    所以我們真的懂得如何"認真玩耍" 來建構宇宙

  • and we create everything we can see in any direction, right,

    只用了小於一小滴淚水的物質開始

  • from almost nothing -- that is, something extremely tiny,

    建構出目前所見到各方向的物體

  • extremely small -- and it is almost perfect,

    從幾乎零開始

  • except it has these tiny fluctuations at a part in 100,000 level,

    如此的小 近乎完美

  • which turn out to produce the interesting patterns and designs we see,

    除了有十萬分之一等級的細微擾動

  • that is, galaxies and stars and so forth.

    才造就了我們所看到的結構與設計

  • So we have a model, and we can calculate it, and we can use it

    就是這些星系與恆星

  • to make designs of what we think the universe really looks like.

    因此 我們有一個模型 能計算 能操弄

  • And that design is sort of way beyond

    來模擬與驗證 我們以為的宇宙

  • what our original imagination ever was.

    也由此學到

  • So this is what we started with 15 years ago,

    超過我們過去的想像

  • with the Cosmic Background Explorer -- made the map on the upper right,

    這些模擬開始於15年前

  • which basically showed us that there were large-scale fluctuations,

    利用宇宙背景探測 建構右上角的地圖

  • and actually fluctuations on several scales. You can kind of see that.

    顯示了大規模的擾動

  • Since then we've had WMAP,

    實際上 有著多波段的擾動 這都可由觀測所得

  • which just gives us higher angular resolution.

    從有WMAP之觀測儀器後

  • We see the same large-scale structure,

    提高了三角幾何角度的解析度

  • but we see additional small-scale structure.

    除了看到大尺度結構

  • And on the bottom right is if the satellite had flipped upside down

    更看到額外的小尺度結構

  • and mapped the Earth, what kind of a map we would have got of the Earth.

    右下角 是衛星上下顛倒的影像

  • You can see, well, you can, kind of pick out

    對應到地球改有的影像

  • all the major continents, but that's about it.

    就能大略看到

  • But what we're hoping when we get to Planck, we'll have resolution

    所有主要的大陸 目前只能這麼清晰了

  • about equivalent to the resolution you see of the Earth there,

    希望當Planck 上線時 希望解析度

  • where you can really see the complicated pattern that exists on the Earth.

    能有像那地球影像一般清晰

  • And you can also tell, because of the sharp edges

    能夠清晰看出地球上的形狀

  • and the way things fit together, there are some non-linear processes.

    由於清晰後 便能夠分辨出版塊間

  • Geology has these effects,

    他們是有關聯的 因為其中有些非線性的演進

  • which is moving the plates around and so forth.

    地理就是有這樣的效應

  • You can see that just from the map alone.

    版塊的移動等等

  • We want to get to the point in our maps of the early universe

    能只從清晰地球地圖看出

  • we can see whether there are any non-linear effects

    我們也希望能如此 得到宇宙早期歷史的清晰

  • that are starting to move, to modify, and are giving us a hint about how

    便能分辨出是否有其他的非線性效應

  • space-time itself was actually created at the beginning moments.

    是否要移動了? 要改變了? 也能給我們些提示:

  • So that's where we are today,

    時空當初是如何被創造的在最初的當下

  • and that's what I wanted to give you a flavor of.

    所以這些就是我們目前的狀況

  • Give you a different view about what the design

    也我想為大家分享的

  • and what everything else looks like.

    給大家對設計的 一個不同觀點

  • Thank you.

    以及宇宙所有事物的介紹

  • (Applause)

    謝謝

I thought I would think about changing your perspective on the world a bit,

譯者: K. C. Peng 審譯者: Benjamin Chiang

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