brilliant offer available only for real-life lore viewers at the end of this video.

輝煌的報價只提供給現實生活中的傳說觀眾在這個視頻的最後。

I'm sure that many of you growing up like me used to spend time dreaming about visiting another planet or another star.

我相信很多人和我一樣，在成長的過程中，曾經花時間夢想著去拜訪另一個星球或另一個恆星。

You've probably heard the phrase, "born too late, to explore the world and born too early

你可能聽過這樣一句話："生得太晚，探索世界；生得太早，探索世界。

to explore the universe," which implies that our ancestors explored the unknown parts of Earth while our

以探索宇宙"，這意味著我們的祖先探索了地球的未知部分，而我們的

descendants will be exploring the unknown parts of our universe, leaving us in the 21st century as the

後代將探索宇宙的未知部分，在21世紀留給我們的是作為

awkward middle children with little exploration to accomplish. But is this really the case? and could our

笨拙的中兒童，幾乎沒有什麼探索可以完成。但真的是這樣嗎，我們的

civilization actually reach out and touch another star during your lifetime?

在你的有生之年，文明真的伸出手去觸摸另一顆恆星嗎？

For reference the nearest other known star closest to our sun is here called Proxima Centauri, but it's still

作為參考，離我們太陽最近的另一顆已知恆星叫做半人馬座，但它仍然是...

4.25 light-years away from us

離我們4.25光年的地方

That doesn't seem too bad

看起來還不錯

So let's explore how to get there using current technology.

那麼，讓我們來探討一下如何利用當前的技術達到目的。

I've talked about the voyager 1 space probe in previous videos, so to summarize,

我在之前的視頻中講過旅行者1號空間探測器，所以總結一下。

this probe is the farthest away from earth that a man-made object has ever been so far.

這個探測器是離地球最遠的地方 一個人造物體到目前為止還沒有到過。

It is currently almost 140 astronomical units away from our sun, meaning that it's

目前，它距離我們的太陽幾乎有140個天文單位，這意味著它的。

140 times farther away from the sun than earth is. To have reached this distance,

離太陽的距離是地球的140倍。要達到這個距離。

voyager utilized gravity assists from both the Jupiter and Saturn to reach a speed of 17 km/s.

旅行者號利用木星和土星的引力輔助，達到了17公里/秒的速度。

But even at this far away distance and at the same speed, it would take voyager another

但即使在這麼遠的距離和同樣的速度下 旅行者號也要再花上一個星期的時間

73,000 years to reach Proxima Centauri.

73000年才到達半人馬座近鄰星。

NASA, however is currently set to launch another space probe just next year in 2018

不過，美國宇航局目前還準備在2018年明年再發射一個太空探測器

that will become the fastest moving object humanity has ever created.

這將成為人類有史以來移動速度最快的物體。

It's called the parker solar probe and it will be sent to study the outer corona of the sun.

它被稱為帕克太陽探測器 它將被派去研究太陽的外冕。

Utilizing repeated gravity assists from Venus, the probe will enter into an elliptical orbit around the sun and at its

利用金星的反覆引力輔助，探測器將進入圍繞太陽的橢圓軌道，並在其

closest point to the sun in orbit, the probe will achieve a velocity of an amazing

探測器將以驚人的速度達到離太陽最近的軌道點。

200 kilometers per second. That's fast enough to zip around the entire earth at the equator

每秒200公里這速度足以在赤道上繞著整個地球飛行了

in 3 minutes and 24 seconds. But it's still only a tiny

用時3分24秒。但它仍然只是一個小小的

0.07% of the speed of light which means that even at that speed it would take the probe well over

光速的0.07%，這意味著即使是在這種速度下，探測器也要花上超過

7,000 years to reach proxima centauri

7,000年才到達半人馬座近地點

So is there any technology that we could reasonably see happening in our lifetime that would enable us to at least

那麼，有沒有什麼技術可以讓我們在有生之年合理地看到，至少可以讓我們做到以下幾點

see another star system up close?

近距離看到另一個星系？

Various ideas have been proposed throughout history but perhaps the most credible one is a recent idea called Breakthrough Starshot.

歷史上提出過各種觀點，但最可信的可能是最近的一個觀點，叫突破星射。

I briefly mentioned Breakthrough Starshot in my video from two weeks ago,

我在兩週前的視頻中簡單地提到了 "突破星影"。

but i didn't go into very much detail about how ambitious and revolutionary this project really is.

但我並沒有深入瞭解這個項目到底有多大的野心和革命性。

If successful,

如果成功。

breakthrough starshot will be one of the most important events of the entire 21st century.

突破性的星象將是整個21世紀最重要的事件之一。

The plan calls to develop a tiny ship on the scale of

該計劃要求開發一種小型飛船，其規模為

centimeters weighing only a few grams with a sail attached to it,

釐米，僅重幾克，上面連著一張帆。

4 meters across by 4 metres tall. It actually calls for a thousand of these tiny ships and sales to be

4米寬，4米高。它實際上是要求有一千艘這樣的小船和銷售要。

created and for all of them to be lifted into orbit by a larger mothership on a conventional rocket.

並由一艘較大的母艦用常規火箭將它們全部送入軌道。

Once in orbit the mothership will deploy one tiny ship and sail at a time.

一旦進入軌道，母艦將部署一艘艘小型飛船，每次航行。

The sail attached to the tiny ships

連接在小船上的帆

will work much like a sail does on a boat on earth but instead of wind providing the necessary

帆的工作原理就像地球上的船帆一樣，但不是由風來提供所需的

propulsion it will be a huge 1 square kilometer ground-based array packed with

推進器將是一個巨大的1平方公里的地面陣列，裡面裝滿了各種不同的材料。

high-powered lasers. This square kilometer of lasers will all concentrate to their collective power onto the tiny sails of the ships

高功率激光器。這一平方公里的激光器將全部集中起來，將它們的集體力量集中到艦船的小帆上。

one at a time, and this should be capable of propelling each vessel to 20% the speed of light in only 10 minutes.

一次一個，這應該能夠在短短10分鐘內將每艘船推進到20%的光速。

Once all 1,000 ships are on their way, they should be able to reach proxima centauri in about 20 years.

一旦1000艘飛船全部上路，它們應該能在20年內到達半人馬座近地點。

And since the scheduled flight time is in the year 2036,

而由於計劃飛行時間是在2036年。

that means that the first human-made spacecraft

這意味著，第一艘人造航天器

to arrive in another star system could take place in the near-ish future of 2056.

抵達另一個恆星系統，可能發生在2056年的近似未來。

That's not to say that the project is without any problems however,

然而，這並不是說這個項目沒有任何問題。

A collision with even a speck of dust at that speed would destroy any of the craft, which is why

在這種速度下，即使是一粒塵埃的碰撞，也會摧毀任何飛船，這就是為什麼

1000 of them are going all at once so at least

一千人一下子就走了，所以至少

some of them will make the journey. In addition the square kilometer laser array on the ground will use up

其中的一些人將會進行旅行。此外，地面上一平方公里的脈衝光陣列將耗費大量的時間。

100 gigawatts of power for each sale that it propels. Which is roughly equivalent

每推動一次銷售，就有100千兆瓦的電量。這大致相當於

to the peak electricity consumption in france at 7:00 in the evening.

傍晚7點是法國的用電高峰。

Acquiring that much power is difficult but still possible.

獲得這麼大的力量雖然困難，但還是有可能的。

Finally, the cost of the entire project is estimated to be at 10 billion dollars,

最後，整個項目的成本估計在100億元。

which sounds like a lot at first, but consider this,

這聽起來像一個很大的第一，但考慮到這一點。

Nasa's budget for 2018 is 19.1 billion dollars, and the cost for the International Space Station has been

美國國家航空航天局2018年的預算為191億美元，國際空間站的費用已被。

150 billion dollars. The U.S. military budget meanwhile in 2015 was nearly

1500億美元。與此同時，美國2015年的軍事預算近乎於

600 billion dollars and the us federal budget for 2018 is well over 4 trillion dollars.

6000億美元，2018年美國聯邦預算遠超4萬億美元。

Taking 10 billion dollars out of any of these enormous amounts of money is not very much to ask for.

從這些鉅額的資金中拿出100億，都不是很過分的要求。

Especially when you consider that there is a planet that orbits inside the habitable zone of Proxima-Centauri

特別是當你考慮到有一顆行星在半人馬座的可居住區內運行時

named proxima-Centauri b

近地點

The ships from Breakthrough Starshot will be capable of taking pictures of this mysterious planet that could reveal

突破星際射擊的飛船將能夠拍攝到這顆神祕星球的照片，可以揭示出

oceans, continents, and other surface features if they exist.

海洋、大陸和其他地表特徵（如果存在）；

Proxima-Centauri B will become the primary focus of future human colonization efforts in our galaxy.

Proxima-Centauri B將成為未來人類在銀河系殖民努力的主要焦點。

10 billion dollars is a very small price to pay for

100億美元是一個非常小的代價。

potentially securing the future of human civilization in our universe.

有可能確保人類文明在我們宇宙中的未來。

And although all of us watching this video were likely born in the century before

雖然我們所有觀看這段視頻的人 很可能出生在世紀之前的時候

humans themselves will visit another star system, we can take pride in laying the

人類自己將訪問另一個恆星系統，我們可以自豪地鋪設

foundations for our descendants to be the explorers that will carry our names and legacies with them.

為我們的子孫成為探險家奠定基礎，使他們能夠帶著我們的名字和遺產。

Any society grows great when old men plant trees whose shade they know they shall never sit in.

當老人種下他們知道自己永遠不會坐在樹蔭下的樹時，任何社會都會變得偉大。

If you still have lingering questions regarding the math behind interstellar flight,

如果你對星際飛行背後的數學問題還耿耿於懷。

how planets outside of the solar system are discovered, or how we know how big the universe is,

太陽系外的行星是如何被發現的，或者說我們是如何知道宇宙有多大的。

then you should know that this video was directly based off the astronomy course offered at brilliant.org.

那麼你應該知道，這個視頻是直接基於關閉的天文學課程提供在輝煌.org。

Brilliant is a truly wonderful online learning platform where you can learn about

輝煌是一個真正精彩的在線學習平臺，在這裡，你可以學習到關於

For example, in their astronomy course they have a section where they help you calculate the time it would take to

例如，在他們的天文學課程中，他們有一個部分，他們幫助你計算需要的時間，以達到

accelerate a solar sail to 20% light speed, and how long it would take the sail

將太陽帆加速到20%的光速，以及需要多長時間才能使帆

to reach the Alpha-Centauri system, which is the exact math that i used in the creation of this video.

達到半人馬座阿爾法星系， 這是確切的數學，我用 在創建這個視頻。

To learn much more about interstellar travel or any other interesting topics,

要了解更多關於星際旅行或任何其他有趣的話題。

This free trial is currently only offered to those who click on

該免費試用目前只提供給那些點擊了

brilliant.org/reallifelore in the description. So if you liked what you just watched and you're

brilliant.org/reallifelore的描述中。所以，如果你喜歡你剛才看的東西，你是

curious to learn more give brilliant a try and you'll be supporting my channel at the same time.

好奇地想了解更多給輝煌的嘗試，你會支持我的管道在同一時間。

inside of the habitable zone of Proxima-Centauri, named Proxima-Centauri B.

在半人馬座的可居住區內，被命名為半人馬座B。

If revealed to be truly habitable in this way,

如果以這種方式揭示出真正適合居住。

math and science in an easily approachable way by solving fun and challenging problems.

通過解決有趣和具有挑戰性的問題，以簡單易懂的方式解決數學和科學問題。

head over to brilliant.org/reallifelore for an exclusive 3-day free trial.

前往 brilliant.org/reallifelore 獲得獨家 3 天免費試用。

Cheers.

乾杯。