百科知識視頻之煎蛋小學堂61 穿梭時空最簡單的3個方式

Time travel can be complicated,and complicating.So let's ignore all the paradoxical stuffs and talk about a few simple ways that you can time travel without leaving your home.

時空穿梭非常復雜。那么讓我們拋棄那些矛盾的東西來談談幾種不出家門穿梭時間的方法。

First,do nothing,You are already traveling through time.I mean,here you are,fifteen seconds into the future since the start of this video.Easy,right? The point is,we are all always traveling forwards through time.But that's boring time travel.What's interesting is time travel relative to other people.

首先 什么都不做你已經(jīng)穿越時間了。我是說現(xiàn)在你已身處于視頻開始15秒后的未來了。很簡單吧?其實我們一直在時空中向前穿梭。但這種時空穿梭很無聊。有意思的是相對別人的時空穿梭。

To do that,start walking,and you'll travel through time relative to someone standing still.We've know for over a century that time and space are really just two components of a single space-time,and the faster you move,the slower time will pass for you.If you take a walk around the block,you'll be 3 femtoseconds younger than your friend who stayed home.

想要成功 走走路 相對那些站著不動的人你就是在做時空穿梭。一個世紀以來 我們都知道時間和空間都是單個時空中的兩個組成元素，你動得越快對你而言時間過得就越慢。如果你繞著樓走，你會比房間中的朋友年輕3飛秒。

Except,in order to walk around the block,you had to stand up.You're now further from the earth,and so gravity is a tiny bit weaker for you.Which menas you are traveling through time relative to your friend who's sitting down.That's right,more gravity makes time slow down,too.If you stand up for a minute,your feet will age 10 femtoseconds less than your head.

不過你得站起來才能在房子周圍走動。現(xiàn)在你離地球更遠對你而言引力弱了一點點。也就是說 相對于那個坐著的朋友你就已經(jīng)在做時間穿梭了。的確 引力更大 時間也更慢。如果你站1分鐘 你的頭部會比足部小10飛秒。

On the other hand,GPS satellites high in orbit experience less of earth's gravity and this travel noticeably faster through time than we do.which is why their clocks are calibrated to run slow.Maybe you wanna time travel more than a few femtoseconds.Get ready for your head to start spinning.I mean,the Universe.Because if the whole universe was spinning really fast,General relativity predicts there will be time loops all over the place.

另外 高空軌道上的GPS衛(wèi)星受到地球引力更小 穿梭的速度也就比我們更快。這也是為什么衛(wèi)星時鐘被調慢了。或許 你不只想穿梭這幾飛秒。準備著讓大腦轉起來吧。我要說的 是宇宙。因為如果整個宇宙飛速旋轉，廣義相對論預測 空間將內處處都是時間循環(huán)。

Moving along one of these loops,you'd always feel like you were moving forwards in time.But overall,you'd loop around and travel back to a time and place in your own past.It's a little like how you can keep moving forwards on the earth,but earth's curvature brings you back to where you started.Unfortunately,our universe isn't spinning.Maybe it would be easier to build an infinite long,super dense spinning cylinder.which would also curse spacetime enough to create a Time Loop.

穿梭于這些循環(huán)內時 你總會覺得自己在走向未來。而整體上 你將穿梭到自己過去一個時間和地點。這有點像是你在地球上不停地向前走，但地球的曲率把你帶回了起點。不幸的是 宇宙并不在自旋。可能做一個無限長 密度無限大的轉筒更簡單點。這也會讓時空彎曲 制造出時間循環(huán)。

The problem,of course,is how do you build something that's infinite in size.Maybe you could just make it really really big?Nnnnn,no.If you try to squeeze this time machine into finite space,you'd need negative energy,something nobody knows how to create,to make it work.Otherwise,you'd end up with a black hole.Wait,but what if instead of a black hole,we built a worm hole?Worms holes are hypothetical,but not physically impossible bridges through spacetime,shortcuts that can instantaneously connect to different places and time in our uneiverse.

當然 問題在于如何造出無限大的物體。那造一個很大很大的呢?吶不行。如果你把這個時間機器塞到有限空間內，想要讓它動起來 得用到?jīng)]人能制造出的負能量才行。要么 結果就是一個黑 洞。等等 如果我們造出的不是黑洞 而是蟲洞呢?蟲洞是假想之物 但并非物理上不可能的 穿越時空的橋梁，它是能瞬間連接宇宙內兩個不同時間地點的捷徑。

If you had a worm hole,you might be able to use it to travel into the past or the future.Problem is,no one knows how to build a worm hole.Or once you've build it,how to keep it from collapsing.As Shawn Carol has eloquently written:Keeping worm holes open requires a form of negative energies.Nobody knows how to make negative energies,although they occasionally slap the name Exotic Matter on the concept and pretend it might exist.

如果你有蟲洞 興許能用它穿梭到過去或未來。只是 問題是沒人知道怎么造蟲洞。造出蟲洞后 又如何阻止它塌縮。正如Shawn Carol所說：讓蟲洞保持打開要用到一種負能量。讓蟲洞保持打開要用到一種負能量。沒有人知道如何制造負能量，盡管人們經(jīng)常就這個概念甩出“異物質”并且假裝它存在。

Well,that's to bad,but as a conciliation,welcome to the future.Almost 3 minutes have past since the beginning of this video.And we now have personal jet packs.

好吧 悲劇了，不過無論如何歡迎來到未來。自這個視頻開始已過去3分鐘?，F(xiàn)在我們也造出了個人噴氣包。