Name: 美國宇航局的望遠鏡可以找到外星生命 (The NASA telescope that can find alien life)
Uploaded: 2022-10-14T17:41:12.000Z
Duration: 8 min 34 s

- Exciting news that James Webb Space Telescope

- 令人振奮的消息，詹姆斯-韋伯太空望遠鏡

得到了它對一顆系外行星的第一次快照。

but first let me just say that this is really cool.

It's a young gas giant around 355 light years away,

它是一個年輕的氣體巨行星，距離約355光年。

but the casual observer it's I don't know,

但是不經意的觀察者，它是我不知道的。

kind of fuzzy like I guess that's a planet.

有種模糊的感覺，我想那是一個星球。

it will never give us an image of an exoplanet

它永遠不會為我們提供系外行星的影像

This is one of the most detailed images of earth ever taken.

這是迄今為止拍攝的最詳細的地球影像之一。

你可以看到陸塊、海洋、雲層。

clear indicators that the planet can harbor life.

清楚地表明，該星球可以孕育生命。

So, how do we get from something like this, closer to this?

那麼，我們如何從這樣的東西，更接近於這樣的東西呢？

好吧，美國宇航局的一個團隊已經接受了任務

that could be a big step in that direction.

這可能是朝著這個方向邁出的一大步。

A mission that could potentially answer the question.

一個有可能回答這個問題的任務。

- A reality is that no current instrument

- 一個現實是，目前沒有任何文書

and instrument that we will have in the future

will be able to bring us direct images of the exoplanets.

將能夠為我們帶來系外行星的直接影像。

- Now, yes, this picture from JWST is a direct image,

- 現在，是的，這張來自JWST的照片是一張直接影像。

但有一點，它是一個氣體巨頭的。

我們正在談論的是一個直接的影像

We've made some pretty big telescopes in the past,

我們過去曾做過一些相當大的望遠鏡。

but to get the picture we're talking about,

但要了解我們正在談論的情況。

the diameter of our earth is about 13,000 kilometers,

我們地球的直徑約為13,000千米。

and I move that object to 100 light years away.

而我把這個物體移到100光年之外。

If I want to image that exoplanet with just one pixel,

如果我想給那顆系外行星成像，只用一個像素。

- 所以讓我們看看，一個90公里的望遠鏡

or Los Angeles to San Bernardino or look, you get it.

或洛杉磯到聖貝納迪諾或看，你懂的。

對於望遠鏡鏡頭來說，它實在是太大了。

而這只是針對一個像素的影像。

- So, Slava and his team turned to a lucky quirk of physics

- 是以，斯拉瓦和他的團隊轉向了一個幸運的物理學怪圈

- Solar gravitational lens is the only way for us

- 太陽引力透鏡是我們的唯一途徑

to start seeing those exoplanets directly

before we will be able to travel to those distant floors.

在我們能夠旅行到那些遙遠的樓層之前。

- Okay. Gravitational lens is really cool

Now, to witness this phenomenon, you need three things.

現在，要見證這一現象，你需要三件事。

something with a lot of mass, like a star,

at these two things in a straight line, like a telescope.

在一條直線上看這兩個東西，就像一個望遠鏡。

Oh, none of this is to scale, by the way,

哦，順便說一下，這些都不是按比例的。

本視頻中沒有任何東西是按比例的。

Okay. The most important thing you have to know

好的。你必須知道的最重要的事情是

and hey, there you go, light has been bent.

嘿，你去那裡，光已經被彎曲了。

in case your eyeballs are doing a lousy job

Lenses can also magnify stuff if it's a convex lens,

如果是凸透鏡，鏡頭也可以放大東西。

所以你知道那是一種凸出來的東西。

Basically, you just need something to bend light

基本上，你只需要一些東西來彎曲光線

by the gravity of something massive like the star.

被像恆星這樣的巨大事物的引力所影響。

This curve in space time is like a convex lens,

這條空間時間的曲線就像一個凸透鏡。

so when light from a distant object hits this curve,

是以，當來自遠處物體的光照射到這個曲線上時。

it bends around it and is then magnified by a lot.

它在它周圍彎曲，然後被放大了很多。

Like think of it like really, really strong reading glasses.

就像把它想成是非常非常強的閱讀眼鏡。

通過望遠鏡觀察這個巨大的物體。

as the light bends around it from just the right angle,

當光線從合適的角度在它周圍彎曲時。

we'll see that light in the shape of a ring

- And that Einstein ring essentially has all the lights

- 而那個愛因斯坦戒指基本上有所有的燈光

- In other words, all the information we need

- 換句話說，我們需要的所有資訊

Now, it's tricky to catch sight of an Einstein ring

現在，要看到一個愛因斯坦環是很困難的

since everything has to be positioned perfectly

因為所有的東西都必須被完美地定位

字幕列表影片播放

美國宇航局的望遠鏡可以找到外星生命 (The NASA telescope that can find alien life)

massive

phenomenon

awesome

slightly