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@lapants/time-travel-a-sky-full-of-ghosts
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@lapants/time-travel-a-sky-full-of-ghosts
时光旅行“漫天幽灵” // Time Travel "A Sky Full Of Ghosts"
想想地球的真实年龄…
Think about how old the really Earth is...
无论你是否有宗教信仰，我们都得承认，比起我们人类的寿命，地球真的年龄超大。想想地球上生存过的几十亿人，从一开始，人们就都想穿越时间。现在，随着当今的科学技术发展，我们终于有能力实现这个梦想了。嗯，不过…
Whether you're religious or not, we can all agree that compared to our lifespan, it's pretty damn old. Think of all the billions of people that have walked the very same ground you do. Since the beginning, man has always wanted to travel through time. Now, with today's technology, we finally have the power to do it! Well, kind of.
这取决于你怎么定义时光旅行了…
It all depends on your definition of time travel...
如果你指的是身体上的，那确实还做不到。不过，我们可以看到。
If you mean physically, we can't do that. Well not yet anyway, but we can view it!
光的旅行
Light Travel
《Family Guy》的制片人塞思麦克法兰，在Netflix制作了一档新的电视节目叫《科斯莫斯：时空奥德赛》。这篇文章的灵感就来自于塞思的“漫天幽灵”系列，那个系列进一步解释了这个主题。
The producer of Family Guy, Seth MacFarlane, produces another TV show on Netflix called 'Cosmos: A Spacetime Odyssey'. This post was inspired by an episode from Seth's series 'A Sky Full Of Ghosts', which explains this subject much further.
在这一系列中，奈尔·德葛拉司·泰森谈到了为什么你每天晚上看到的星星没有那么亮。因为有些星星很久以前就死了。光的传播需要时间，我们看到的可能是数百甚至数千年前的星星的样子。
In this episode Neil deGrasse Tyson talks about how most of the stars you see every night aren't even shining anymore. Some died long ago. Light can only travel so fast which means that at some distances in space, the images we're seeing from the stars can be from hundreds or even thousands of years ago.
你知道宇宙中的星星比这个星球上的沙粒还多吗？
Did you know there are more stars in the universe than grains of sand on this planet?
这些星星有的超级小，有的大到难以想象。
That's pretty huge considering the stars can be anywhere from the size of the Earth, to sizes bigger than you could even imagine.
这是银河的大小…
This is the size of our galaxy the Milk Way...
这是跟我们的星系相比，我们能观察到的宇宙的一小部分。
and this is our galaxy compared to a small part of our observable universe.
据估计，在我们的宇宙中有超过1000亿个星系，有些比我们自己的星系大得多。
There are estimated to be over 100 BILLION galaxies in our universe, some much bigger than our own.
宇宙大约460亿光年长，并且在不断扩大。当你在处理广泛的距离时，你会听到“光速”这个术语，它指的是光速的速度。光速是每秒299,792 公里，或每小时670,615,605英里，在很短的时间内这真是一个令人难以置信的距离。
The universe is about 46 billion light years long and constantly still expanding.When you're dealing with distances that wide, you'll hear the term 'light speed', which refers to the speed at which light travels. Light speed is 299,792 kilometers per second, or 670,615,605 miles per hour, which is an incredible distance in just a short amount of time when you really think about it.
那么时间旅行是真的吗？
So is time travel real?
从技术上讲，只要你在空间上走得远，你可以看到历史上的任何事件。在遥远的某个地方，如果你看到我们的星球，你会看到泰坦尼克号沉没…如果你走得更远，你会看到罗马人征服世界。
Technically speaking, you could see any event that's ever taken place on Earth as long as you're far enough in space. Somewhere far out there, if you looked at our planet, you would see the Titanic sinking... If you traveled even farther, you'd see the Romans conquering the world.
如果你走得更远，你会看到恐龙四处游荡。也许这就是没有人想来拜访我们的原因…
If you went even further, you would see dinosaurs roaming around. Maybe that's the reason no one wants to visit us...
你怎么想呢？
现在你知道宇宙有多大，也知道光速的原理，我想知道你怎么看时光旅行这个问题！
发表评论，并与他人分享吧！
What's your opinion?
Now that you have an idea of how big the universe is and how light speed works, I want to know your opinions on it!
Leave a comment and share with others!
Photos Credits:
www.static.dnaindia.com, www.sidereel.com, www.universetoday.com, www.astronomy.com
这个帖子的原作者是 @lapants. 你可以在这里找到原文 :
@lapants/time-travel-a-sky-full-of-ghosts
This post was originally written by @lapants. You can find the original story here:
@lapants/time-travel-a-sky-full-of-ghosts