-Start learning intuitively with Brilliant for 20% off by being one of the first 200 people to sign up at Brilliant.org/reallifelore.

-在Brilliant.org/reifelore註冊的前200人中，以20%的折扣開始直觀地學習。

-So you probably know that stars are pretty far away

-所以你可能知道星星離你很遠吧？

-But you may have also dreamed about visiting one since you were a kid.

-但你也可能從小就夢想著去參觀一個。

-Science fiction has taught us that travelling to a distant star system may not be too far off in the distant future.

-科幻小說告訴我們，在遙遠的未來，到遙遠的星系旅行可能並不遙遠。

-But Science fiction rarely gets into some of the largest problems that surround this concept.

-但科幻小說很少涉及到圍繞這個概念的一些最大的問題。

-I've made one video before discussing the possibility of humanity reaching another star in your life-time and to summarize that one,

-我之前做過一個視頻，討論人類在你們有生之年到達另一顆恆星的可能性，總結一下那個視頻。

-The best you can hope for is *Maybe* a tiny probe the Proxima Centauri system sometime in a few decades

-最好的希望是幾十年後的某個時候，可能會有一個小型的探測器進入半人馬座近鄰星系統。

That might be capable of taking some pictures of the planets there

也許能拍到一些行星的照片呢？

But as for you actually going yourself in visiting a planet that orbits a distanse star

但對於你自己去拜訪一個繞著遙遠恆星運行的星球來說

Unless you can figured out how to become immortal you likely never will

除非你能想出如何成仙，否則你可能永遠也成不了仙了

And here are some of the biggest reasons why

以下是一些最大的原因

The distances are obviously huge and traveling across those distances will take a lot of time

距離顯然是巨大的，跨越這些距離將需要大量的時間。

The fastest speed that humanity has ever achieved with a man-made object was using a Helios 2 prom

人類用人造物體達到的最快速度，是用太陽神2號宣傳片。

which ** to 240 000km/h

其中**為24萬公里/小時

That's fast enough to circle around the entire Earth in just about 10 minutes.

這速度足以在10分鐘內環繞整個地球一圈。

With going in that speed will still take about 19 000 years

以這個速度下去，還需要19000年左右的時間

of just reach Proxima Centauri - the nearest other star to the Sun

剛剛到達半人馬座--離太陽最近的其他恆星。

But lets speculate for a moment now that perhaps this is the fastest speed that we ever could reach using a spaceships with actuall humans on board

但讓我們來猜測一下，也許這是我們能達到的最快的速度，使用的是有actuall人類的宇宙飛船。

We build a ship with about 100 person crew that we populated-self over generations until we gets to Proxima Centauri

我們建造了一艘有100名船員的飛船，經過幾代人的努力，直到我們到達半人馬座近鄰星。

This concept is known as Generation Ship

這個概念被稱為 "一代船"。

and the people on board will live their entire lifes without every living the small space of the ship

而船上的人一生都將生活在船上，而不需要生活在船上的狹小空間裡。

before arriving at its destination over 600 generations of people will live at this bizzare exsistance

在到達目的地之前，600多代人將生活在這個怪異的世界裡。

before finally arriving 19 000 years later at their destination and goal:

最後在19000年後到達他們的目的地和目標。

The first humans to ever colonised antoher star system.

第一批殖民他星系的人類。

The only problem is tho: after they finally do arrive, they not only discover, that humans are already there,

唯一的問題是：當他們終於到達後，他們不僅發現，人類已經在那裡了。

but have been there already for tousands of years

千古流芳

and have completly colonised the new planet with milions of people and huge cities.

並已經完全殖民了新的星球，擁有百萬人口和巨大的城市。

The reason this could happend is that the people of 2018 assumed the speed of 240 000 km/h

之所以會出現這種情況，是因為2018年的人們假設時速為24萬公里。

was the fastest speed we could achieved on a ship

是我們在船上能達到的最快速度。

and so they send up their colonists under that assumption.

所以他們就在這種假設下派出了他們的殖民者。

However, after 19 000 years into their yourney, they were still 18 000 years more away from getting to their planet.

然而，在他們進入你的世界19000年後，他們距離到達他們的星球還有18000年。

Back on Earth, tho, a thousand years of technological development was enough time to discover much faster forms of space travel.

在地球上，一千年的技術發展足以發現更快的太空旅行形式。

And the people od the year 3018 will be capable of sending out colonist on the ship that could reach the planet in just 5 000 years.

而3018年的人們將有能力派遣殖民者上船，只需5000年就能到達地球。

So their ship endend up passing the one l*** in 2018 arrived to the destination planet thousands of years before it

所以他們的飛船endend起來經過2018年的一個l***到達目的星球的時候，比它早了幾千年。

and have enougt time to completly develop civilisation there before the 2018 ship arrived

並在2018年船到之前有足夠的時間在那裡完成文明的發展。

and discover their entire 19 000 years of deal and suffering was all for... nothing.

發現他們一萬九千年來的交易和苦難都是為了... ...一無所有。

Who knows what psychological or feel self- problems such an experience could create for those people

誰知道這樣的經歷會給這些人帶來怎樣的心理或感覺上的問題呢？

But this entire problem is known as the Wait Calculation

但這整個問題被稱為 "等待計算"。

When is the optimal time for humanity to send colonist out to another star?

什麼時候是人類向其他恆星派遣殖民者的最佳時機？

The concept was first written about by Andrew Kennedy in a paper written in 2006.

這個概念最早是由安德魯-肯尼迪在2006年撰寫的一篇論文中寫到的。

Kennedy assumed, that it have to be a minimum travel time to any place in the Universe.

肯尼迪認為，它必須是一個最小的旅行時間到宇宙中的任何地方。

And that ment was our technology was close to achieving it we could safely send colonist out and avoid the risk of living too early for nothing.

而那ment是我們的技術已經接近實現了，我們可以安全地把殖民者送出去，避免了過早地白活的風險。

But deciding when the best time to live is.. is pretty complicated.

但決定什麼時候是最佳的生活時間是... 是相當複雜的。

And think about the implications that poses to any would-be space traveler:

想想這對任何未來的太空旅行者的影響。

Would you volunteerly signed up to be locked in the space ship for the rest of your life,

你會自願報名被鎖在太空梭裡度過餘生嗎。

along with your children's life and their children's, and their children's and so on houndred of time over?

還有你孩子的生活，他們孩子的生活，還有他們孩子的生活，等等無數次的時間？

When the only pay-off will be being told that: One day humanity will colonise another planet star thanks to your sacrifice?

當唯一的回報會是被告知。總有一天人類會因為你的犧牲而在另一個星球上殖民？

But then you remember the Wait calculation and release that only pay of is actually a huge gamble

但你還記得Wait的計算和釋放，只有支付的其實是一個巨大的賭博。

and you sacifice maybe worthless and along run.

而你的骶骨也許一文不值，沿著運行。

You'll be insine to take that risk and everybody else will feel the same way,

你會不顧一切地去冒這個險，其他人也會有同樣的感覺。

so convincing anybody to get on the Generation Ship like this at almost anytime in the future

所以，說服任何人在未來幾乎隨時都可以上這樣的一代船。

would be almost impossible..unles you forced them to.

幾乎是不可能的 除非你強迫他們這麼做

Would be colonist always assumed, that peopole in the future would just create faster form of transportation,

殖民者總是認為，未來的人們會創造出更快的交通方式。

that would completly negate their own journeys?

這將徹底否定自己的行程？

That is until we descover a way to travel at or near light speed.

直到我們發現了一種以光速或接近光速旅行的方法。

It appears, that the speed od light is the Universe highest speed limit.

看來，光速是宇宙的最高速度極限。

And so, naturally, if humanity ever discover a way to travel near it,

所以，自然而然，如果人類有一天發現了靠近它的旅行方式。

potential colonists could rest their sure that they sacrifices their travel that never be en vain.

潛在的殖民者可以休息他們的肯定，他們犧牲他們的旅行，永遠不會是徒勞的。

Like the explorers aboard the ABC Jungle Fruit

就像ABC叢林水果號上的探險家一樣

are cruisers searching for resourses

巡洋艦在尋找資源