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  • (Incoming transmission from Phil Plait...) Welcome to our Solar System.

    (Phil Plait傳來訊息...)歡迎來到我們的太陽系

  • Below you will find our sun. Our star is 2 octillion tons of hot hydrogen gas emitting

    往下面你就會找到我們的「太陽」,這顆恆星是團2x10²⁷噸的熱氫氣

  • 400 septillion joules of energy every second. The hottest part of the sun is its 15 million°C

    每秒散發出4x10²⁶焦耳的能量。太陽最高溫的部分是攝氏1500萬度的核心

  • core, where it's been fusing hydrogen into helium for the past 4.6 billions years. Despite

    46億年來,這裡不斷把氫熔合轉換成氦

  • that, it's only considered a middle aged star!

    儘管如此,太陽還只算處於中年期呢!

  • Now let's check out the closest planet to our sun, Mercury. Orbiting the sun in just

    現在來看看最靠近太陽的行星「水星」,繞行太陽一圈只要88天

  • 88 days, Mercury also has the most elliptical orbit of any planet. It spins very slowly,

    水星的繞行軌道還是其他行星中最橢圓的,自轉速度非常緩慢

  • once every 2/3 of its orbital period. Despite its surface reaching a blistering 430°C, it still has

    自轉一次時為軌道週期的三分之二。雖然水星表面可達熾熱的攝氏430度

  • water ice in permanently shadowed craters near its poles, where the temperatures stay below -170° C.

    但在南北極附近,終年陰暗的坑洞中擁有冰,這裡的氣溫維持在攝氏負170度以下

  • The next planet in our solar system is Venus. It's the planet with the hottest surface

    太陽系的下個行星是「金星」,有著最熱的表面溫度,攝氏460度

  • temperature; at 460°C it's hot enough to melt lead. Its air is almost entirely composed

    足以把鉛融化。金星的大氣幾乎都由二氧化碳組成

  • of carbon dioxide, with a thick layer of sulfuric clouds. Its rotational axis is flipped upside-down,

    和一層濃厚的硫酸雲。金星的自轉軸上下翻轉

  • which means that the planet spins backwards.

    意味著金星的自轉方向是逆著轉的

  • The third and best understood planet is Earth. Our home planet has a dense metal core, a

    第三顆行星,就是我們最熟知的「地球」。我們的母星有著高密度的金屬核心

  • thick viscous rock mantle, and a thin crust. It's unique in the solar system for having

    黏稠而厚厚的岩石地函,還有薄薄的地殼。地球是太陽系中唯一一顆人類居住、

  • humans and permanent liquid water on its surface. Other planets may get the former soon.

    液態水永存於表面的行星。也許不久後,人類能居住到其他行星上

  • At 3470 km in diameter, our Moon has the largest moon-to-planet size ratio. It's thought to have

    月球直徑3470公里,以衛星與行星的相對大小比例來說,月球是最大的

  • formed when a small planet impacted Earth at a grazing angle billions of years ago.

    月球被認為是幾十億年前,一顆小行星擦撞地球而形成

  • It's heavily cratered, and has huge flood plains on it called maria.

    月球表面坑坑洞洞,還有大片泛濫的平原,稱作「月海」

  • Next up in our system is Mars. Its iconic red color comes from its rusty rocks and dust.

    接著在太陽系裡的是「火星」,它指標性的紅色來自生鏽的岩石及塵埃

  • In the past Mars was once very wet, with oceans, a thick atmosphere, and a warmer climate.

    火星曾經相當潮溼,存在海洋、厚大氣層還有較溫暖的氣候

  • But its lack of a magnetic field meant no protection from the solar wind, which eroded its atmosphere away.

    但火星缺乏磁場,也就無法防護太陽風消蝕大氣層

  • Between Mars and Jupiter is a large asteroid belt.

    火星跟木星之間有條巨大的小行星帶

  • It's a ring shaped region containing rubble leftover from the formation of the planets.

    行星形成時的殘骸、碎片,組成了這個環狀區域

  • Past the asteroid belt we find our systems Jovian planets, starting with Jupiter.

    穿過小行星帶,我們可以找到太陽系中的類木行星,第一顆為「木星」

  • A gas giant, it's the largest planet in our solar system. It has a dynamic atmosphere, including

    木星是顆氣態巨行星,也是太陽系中最大的行星,擁有動態的大氣層

  • belts, zones, and a gigantic red spot created by a persistent hurricane. The Great Red Spot

    大氣層有帶、區之分,還有持續的氣旋形成的巨大紅斑

  • is a persistent anticyclonic storm. The spot is large enough to contain three Earth-sized

    大紅斑是個持久性反氣旋風暴,大小足以容納三個地球

  • planets. It's still unclear what exactly gives the spot its red color.

    而大紅斑呈現紅色的原因還是不清楚

  • The next planet in our system is Saturn. It's a gas giant with a broad set of rings.

    太陽系的下個行星是「土星」,也是氣態巨行星,有著一組寬闊的土星環

  • It has a hexagonal cloud pattern on its north pole. It's the least dense of all the planets,

    土星北極有六邊形雲彩,其密度低於其他行星

  • even less dense than water! Made up of ice particles, Saturn's rings are 250,000 km across,

    甚至比水還要低呢!土星環由冰的微粒組成,寬度為25萬公里

  • but only 10 meters thick! Gaps in the rings are created the gravitational tugging of the moons orbiting Saturn.

    但厚度竟然只有10公尺!土星環的縫隙,來自土星許多衛星的引力拉扯

  • Uranus is an ice giant with a small rocky core and a thick mantle of ammonia, water, and methane.

    「天王星」是顆冰巨行星,有小顆的岩石核心,和氨、水、甲烷組成的龐大地函

  • It also has thirteen distinct rings. Uranus has a huge tilt -- 98°, with respect to its orbit.

    天王星也有13個清晰的環。從運行軌道來看,天王星有十分傾斜的角度─98度

  • A massive glancing collision long ago is one hypothesis to explain the extreme tilt.

    解釋其異常傾斜的一種假設是:很久以前,天王星受到強大而傾斜的撞擊

  • Technically considered the last planet in our solar system, Neptune is an ice giant,

    「海王星」也是冰巨行星,基本上算是太陽系最後一顆行星

  • with a similar composition to Uranus. It's the most dense of the outer planets and the

    成分與天王星相似。海王星是帶外行星中,密度最大的

  • only planet found by mathematical prediction rather than by empirical observation.

    海王星是唯一由數學預測而找到的行星,而不是靠經驗觀察

  • At the outer edges of our solar system we find the Kuiper Belt, filled with smaller rocky and icy bodies.

    在太陽系的外緣,我們可以找到庫柏帶,是由較小的岩石及冰組成

  • Pluto is in this region. It was originally discovered in 1930 and categorized as a planet,

    冥王星即在此區,1930年發現冥王星時,原本把它列為行星

  • but it was recategorized as a minor planet in 2006.

    但在2006年重新歸類為微型行星

  • And there you go -- a crash course on our solar system. Even though we've explored a lot of it, there's still

    就是這樣啦!太陽系構造的速成班。雖然我們探索了不少

  • a huge amount left to discover. And that's the beauty of science: there's always more to learn.

    但還有好多好多有待我們去發掘。這正是科學的美妙──永不止息的學習

  • Thank you so much for watching! This video was created by the folks at Thought Café

    非常謝謝你的收看!影片是由Thought Café製成

  • who have their own channel with awesome animated videos. Make sure to check them out and subscribe.

    Thought Café頻道裡有許多精美的動畫短片。一定要去看看還有訂閱

  • Links below in the doobly-doo!

    連結就在下方的資訊欄裡喔!

(Incoming transmission from Phil Plait...) Welcome to our Solar System.

(Phil Plait傳來訊息...)歡迎來到我們的太陽系

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B2 中高級 中文 美國腔 CrashCourse 行星 太陽系 金星 火星 海王星

【虛擬實境】用360度體驗探索太陽系! (Explore The Solar System: 360 Degree Interactive Tour!)

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    韓澐 發佈於 2016 年 05 月 04 日
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