如果宇宙除了地球都是反物质会怎样？
字幕摘录
| 时间 | 英文 | 中文 |
|---|---|---|
| 0:00 | This question comes from Sean who asks, what if everything was antimatter except Earth? | 这个问题来自肖恩 谁问, 如果一切都是反物质 除了地球? |
| 0:05 | This one doesn't end well for us, but unlike most scenarios involving the word antimatter, | 这对我们来说不是个好结果 但和大多数涉及反物质的情景不同 |
| 0:09 | the end is surprisingly slow and drawn out. | 结局令人惊讶的缓慢和抽出。 |
| 0:13 | The whole universe is matter as far as we can tell. | 据我们所知,整个宇宙都很重要 |
| 0:16 | No one is sure why there's more matter than antimatter since the laws of physics are pretty | 没有人知道为什么物质比反物质更重要 因为物理定律是漂亮的 |
| 0:19 | symmetrical and so there's no reason to expect there to be more of one than the other, although | 对称的,所以没有理由 期望有一个比另一个多,虽然 |
| 0:22 | when it comes down to it there's no reason to expect anything at all. | 当它降到它 没有任何理由期望任何东西。 |
| 0:25 | It's possible that some | 可能有些会 |
| 0:26 | galaxies are made of antimatter and we just haven't noticed because we haven't tried to touch them. | 星系由反物质组成 我们只是没有注意到 因为我们没有试图触碰它们。 |
| 0:30 | This is a cool idea, but if there are zones of matter and zones of antimatter in the universe, | 这是一个很酷的想法, 但如果有 物质区和反物质区 在宇宙中, |
展开字幕全文（65 条）
| 序号 | 英文 | 中文 |
|---|---|---|
| 1 | This question comes from Sean who asks, what if everything was antimatter except Earth? | 这个问题来自肖恩 谁问, 如果一切都是反物质 除了地球? |
| 2 | This one doesn't end well for us, but unlike most scenarios involving the word antimatter, | 这对我们来说不是个好结果 但和大多数涉及反物质的情景不同 |
| 3 | the end is surprisingly slow and drawn out. | 结局令人惊讶的缓慢和抽出。 |
| 4 | The whole universe is matter as far as we can tell. | 据我们所知,整个宇宙都很重要 |
| 5 | No one is sure why there's more matter than antimatter since the laws of physics are pretty | 没有人知道为什么物质比反物质更重要 因为物理定律是漂亮的 |
| 6 | symmetrical and so there's no reason to expect there to be more of one than the other, although | 对称的,所以没有理由 期望有一个比另一个多,虽然 |
| 7 | when it comes down to it there's no reason to expect anything at all. | 当它降到它 没有任何理由期望任何东西。 |
| 8 | It's possible that some | 可能有些会 |
| 9 | galaxies are made of antimatter and we just haven't noticed because we haven't tried to touch them. | 星系由反物质组成 我们只是没有注意到 因为我们没有试图触碰它们。 |
| 10 | This is a cool idea, but if there are zones of matter and zones of antimatter in the universe, | 这是一个很酷的想法, 但如果有 物质区和反物质区 在宇宙中, |
| 11 | we should see a telltale gamma ray glow from matter-antimatter annihilations along the | 我们应该看到伽马射线从物质毁灭中发光 |
| 12 | boundaries between the zones. | 区域之间的界限。 |
| 13 | So far we haven't seen that anywhere nearby, although another | 目前为止,我们还没有看到 在附近任何地方,虽然另一个 |
| 14 | telescope might help. | 望远镜可能有用。 |
| 15 | If the entire rest of the universe were swapped out for antimatter, | 如果宇宙的其余部分被换成反物质 |
| 16 | then we'd be in trouble. | 那样我们就会有麻烦了 |
| 17 | Outer space isn't really space, it's full of a thin gas. | 外太空不是真正的空间,它充满了稀薄的气体. |
| 18 | | |
| 19 | technically a plasma. | 技术上是血浆 |
| 20 | Okay, technically there's also a substantial quantity of solid grains of | 好吧,从技术上讲,还有大量的固体谷物 |
| 21 | dust. | 尘. |
| 22 | Look, there's a bunch of little bits of stuff that are hard to see, okay? | 看,有一堆小东西 很难看到,好吗? |
| 23 | | |
| 24 | except when they're not hard to see. | 除非他们不难看 |
| 25 | And if they are all swapped for antimatter, we're in trouble. | 如果全部被换成反物质 我们就有麻烦了 |
| 26 | The Earth's magnetic field protects us from the solar wind, and it would protect us from an | 地球磁场能保护我们免受太阳风的侵袭 它能保护我们免受太阳风的侵袭 |
| 27 | anti-solar wind too. | 反索拉风也. |
| 28 | A tiny fraction of the particles from the sun do reach Earth funneled | 微小的微粒从太阳到达地球 |
| 29 | down by our magnetic field, and those create the aurora. | 我们的磁场下, 这些创造极光。 |
| 30 | In this scenario, the aurora would | 在这种情况下,极光会 |
| 31 | get a lot brighter, but most of the time not bright enough to really cause problems. | 变得更光明, 但大部分时间 不够明亮 真正造成问题。 |
| 32 | Meteors | 气象师 |
| 33 | would be the real problem. | 这将是真正的问题。 |
| 34 | The Earth sweeps up space dust as it travels around its orbit. | 地球在绕着它的轨道行走时,扫荡着太空尘埃。 |
| 35 | Somewhere around 30 tons of dust per day enters the atmosphere in the form of tiny grains, | 每天约30吨的尘埃以微粒的形式进入大气层, |
| 36 | most weighing about 10 to the minus 5 grams. | 重约10克到5克 |
| 37 | An additional similar average per day amount arrives | 每日增加的类似平均数 |
| 38 | in giant clumps all at once. | 一次又一次地在巨型突袭中 |
| 39 | This inflow of antimatter micrometeor dust would collide with | 反物质微气象尘埃的流入会与 |
| 40 | the top of our matter atmosphere and be annihilated. | 和被毁灭。 |
| 41 | The interactions between the nucleons and | 核子和核子之间的相互作用 |
| 42 | antinucleons would be complex, but the end result would be a lot of neutrinos which would fly away, | 反核是复杂的,但最终的结果是 大量的中微子会飞走, |
| 43 | and a lot of gamma rays which would turn into heat. | 很多伽玛射线会变成热量 |
| 44 | This steady flow of material and heat | 这种稳定的物质和热流 |
| 45 | would be the worst around dawn when your house was facing in the direction of Earth's motion. | 这将是最糟糕的 在黎明 你的房子正面临地球运动的方向。 |
| 46 | The heat and light added by antimatter would certainly be enough to tip the Earth into a | 反物质增加的热量和光线 肯定足以使地球变成一个 |
| 47 | greenhouse scenario, quickly turning our planet into something resembling Venus. | 温室情景 迅速把我们的星球 变成类似金星的东西 |
| 48 | But the big antimatter meteors would get us first. | 但大反物质流星会先得到我们 |
| 49 | Even a relatively small antimatter object | 甚至一个相对小的反物质物体 |
| 50 | similar in size to the Chelyabinsk meteor would deliver as much energy as the matter meteor that | 与车里雅宾斯克陨石的大小相似 和物质流星一样能提供能量 |
| 51 | killed the dinosaurs. | 杀了恐龙。 |
| 52 | Meteors the size of Chelyabinsk hit the Earth roughly every 50 years, | 车里雅宾斯克大小的气象器 每50年撞击地球一次 |
| 53 | but the slightly smaller ones entered the atmosphere every few months, mostly unnoticed. | 但小一些的每几个月进入大气层 大多是不被注意的 |
| 54 | If they were all antimatter, each one would trigger a tremendous pulse of energy in the sky | 如果它们都是反物质 就会在天空中产生巨大的能量 |
| 55 | and ignite a massive firestorm. | 并点燃大火暴 |
| 56 | Right now, it's still an open question whether any significant | 现在,这个问题还有待商榷 是否有重大意义 |
| 57 | non-zero percentage of the stuff in the sky is made of antimatter. | 天空中非零百分比的东西是由反物质制成的。 |
| 58 | It's probably not, but we need | 也许不是 但我们需要 |
| 59 | to build another orbiting gamma ray telescope to really be sure. | 建造另一台轨道伽马射线望远镜 真正确定 |
| 60 | However, it's easy to use a | 但是,它很容易使用一个 |
| 61 | telescope to rule out one possibility, that everything in the sky is antimatter. | 以排除一种可能性 天空中的一切都是反物质 |
| 62 | If it were, | 如果是的话 |
| 63 | your telescope, and everything else, would be on fire. | 你的望远镜 还有其它的 都会着火 |
| 64 | If you have a telescope that's not on fire, | 如果你有没有着火的望远镜 |
| 65 | maybe you can get that result published. | 也许你可以公布结果 |
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