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  • About 4.3 light-years from Earth lies our closest stellar neighborhood.

    我們最近的恆星鄰居,離地球約 4.3 光年。

  • The Alpha Centauri system consists of three known stars.

    半人馬座阿爾法星系由三顆已知的恆星組成。

  • Alpha Centauri A and Alpha Centauri B are a binary pair, which means they orbit a common center of mass.

    半人馬座α星A和半人馬座α星B為一對雙星,意思是它們圍繞一個共同質心公轉。

  • The third star, Proxima Centauri, is the closest to Earth at about 4.22 light-years away.

    第三顆恆星是比鄰星,距離地球最近,約 4.22 光年。

  • In 2016, astronomers detected an Earth-sized planet orbiting Proxima Centauri within the

    2016 年,天文學家在恆星的適居帶內,探測到一顆地球大小的行星,

  • star's habitable zone - the right distance to potentially support liquid water on its surface.

    在比鄰星的軌道上運行——這合適的距離,支持表面有液態水的可能。

  • Which is why eyes are on Alpha Centauri as our first destination once we master interstellar travel.

    這就是為什麼一旦我們掌握星際旅行,半人馬座α會是我們的首要目的地。

  • So is this deep space journey possible in our lifetime?

    那麼,這種深太空旅程在我們一生中能達成嗎?

  • And if so, how will we get there?

    如果可以,我們要怎麼到達那裡?

  • Outer space is bigger than we can comprehend

    外太空比我們所理解的還大,

  • and sending a spacecraft into its depths takes a lot of time.

    而且將太空船送入深處要花很多時間。

  • NASA's Voyager 1 is Earth's farthest spacecraft to date.

    NASA 的航海家 1 號是目前距離地球最遠的太空船。

  • It was launched in 1977, and in 2012, it was the first craft to enter interstellar space.

    它於 1977 年發射,在 2012 年,成為第一個進入星際空間的太空船。

  • If Voyager 1 was pointed in the direction of Alpha Centauri, it would still take tens of thousands of years to reach the system.

    如果航海家 1 號指向半人馬座α的方向,那到達該星系仍需數萬年。

  • And that's because its propulsion system is not ideal for deep space travel.

    那是因為它的推進系統不適合深太空旅行。

  • So clearly we need a faster way to get to our stellar neighbors.

    因此,很明顯我們需要更快的方式來到達附近的恆星。

  • Some scientists believe that our best attempt at interstellar travel are lightsails.

    有些科學家相信光帆是星際旅行最好的嘗試。

  • These sails would be made of ultra-thin sheets that will be propelled using light instead of wind.

    這些帆由超薄的薄片製成,這些薄片使用光而不是風來推進。

  • One of the major initiatives researching their potential is Breakthrough Starshot.

    研究光帆潛力的一個主要計畫叫「突破星擊」。

  • The program, initially backed by late cosmologist Stephen Hawking, aims to create a nanocraft

    該計劃最初由已故的宇宙學家史蒂芬.霍金支持,目的是建造奈米太空船,

  • comprised of a lightsail and a gram-scale wafer that hosts a number of instruments called a StarChip.

    由光帆和和克量級的晶片組成,可以容納大量稱為「星晶片」的儀器。

  • The nanocraft has a mirror-like sail design and is measured at 10 square meters with a mass of less than 1 gram.

    奈米太空船的帆為鏡像設計,在 10 平方公尺下測量,質量小於 1 克。

  • By comparison a penny weighs 2.5 grams,

    相比之下,一分錢是 2.5 克,

  • so these spacecraft will be ultralight.

    因此這些太空船將是超輕型的。

  • The lightsail will purportedly be accelerated by laser radiation pressure from Earth at about 20 percent the speed of light.

    光線據說會受到地球雷射輻射壓力而加速,速度約為光速的 20%。

  • The planned laser array, called a Light Beamer, will fire beams as powerful as 100 gigawatts of specific wavelengths of near-infrared light.

    計畫中的雷射陣列稱為「雷射推進裝置」,可發射強度為 100 兆瓦,特定波長的近紅外光束。

  • The nanocraft sail would need to reflect a huge majority of the laser light to avoid instantly burning up on contact.

    奈米太空船的帆需要反射大部分雷射光,以避免接觸時立即燃燒。

  • The idea is to launch thousands of nanocraft at once to increase the chances that at least

    一次發射上千個奈米太空船的想法,目的是要增加機會,

  • a few will conquer the elements and reach Alpha Centauri.

    至少要有少數能克服環境因素,到達半人馬座α。

  • If they do make it, it's estimated, the journey will only take around 20 years.

    如果它們可以做到,估計這趟旅程只需 20 年左右。

  • Though some critics are skeptical about the ability to execute Breakthrough Starshot,

    雖然有些批評人士懷疑突破星擊的執行率,

  • some of the world's greatest minds are actively working to make it a reality.

    但世上有些厲害的人正積極實現此計畫。

  • The project is pushing the boundaries of science, challenging humans to create an entirely new

    該項目在推動科學的界限,考驗人類能否創造出一種全新的器材,

  • material that meets all the extreme needs of the lightsails

    來滿足光帆所需的極端需求,

  • and to design the largest laser ever constructed.

    並設計出史上最大的雷射裝置。

  • But, if engineers and scientists are able perfect these pint-sized spacecraft and we

    但是,如果工程師和科學家能完美製造小型太空船,

  • achieve interstellar travel, humanity will be rewarded with an entirely new understanding of the alien worlds beyond our own.

    而我們也能實現星際旅行,那人類將獲得超出自身外,對其他世界的全新理解。

  • If you're looking to learn more about space exploration and astronomical phenomena be sure to watch this episode of Space Crafts.

    如果你想學更多關於太空探索和天文現象的知識,一定要記得觀看 Space Crafts 這集的內容。

  • And don't forget to subscribe to Seeker for all things science.

    為了學到所有的科學知識,別忘了訂閱 Seeker 。

  • Thanks for watching!

    謝謝觀看!

About 4.3 light-years from Earth lies our closest stellar neighborhood.

我們最近的恆星鄰居,離地球約 4.3 光年。

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B2 中高級 中文 美國腔 太空船 恆星 奈米 雷射 星際 到達

我們將如何去半人馬座阿爾法星? (How Will We Get to Alpha Centauri?)

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    Jerry Liu 發佈於 2021 年 01 月 14 日
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