我們稱這段旅程為「公轉」。它恰好需要 365 天（以及額外的幾個小時），這就是為什麼我們每四年會有一次閏年。這顆行星看起來是紅色的，是因為它的表面覆蓋著氧化鐵，這與讓舊金屬生鏽的物質相同。它也是我們太陽系中最大火山的所在地。這個巨大的發光氣體球提供了地球上生命存在所需的所有光和熱。如果沒有它的能量，我們的世界將會是黑暗且冰凍的。如果你在晚上去一個非常黑暗的地方，你可以看到天空中有一條模糊的白色星帶。這就是我們居住的巨大恆星「島嶼」的邊緣。這層氣體毯提供了我們呼吸所需的氧氣，並保護我們免受太陽有害射線和微小太空岩石的傷害。太陽非常巨大，內部大約可以容納一百萬個地球。它在天空中看起來很小，僅是因為它距離我們有 9300 萬英里。這些勇敢的探險家經歷了多年的訓練，以便在零重力環境下生活和工作。他們曾訪問過月球，目前居住在國際太空站。雖然以前有九顆，但冥王星在 2006 年被重新歸類為矮行星。現在，我們從水星開始一直到海王星計算主要行星。這個「斑點」實際上是一個巨大的類颶風風暴，寬度是整個地球的兩倍。它已經旋轉了至少 300 年！雖然其他行星也有環，但這顆行星的環是最壯觀的，由數十億個圍繞行星運行的冰塊、灰塵和岩石組成。這顆巨型行星非常大，內部可以容納超過 1,300 個地球！它很容易因其著名的「大紅斑」而被識別，而那實際上是一個巨大的風暴。作為太陽最近的鄰居，這顆小型岩石行星在其軌道上的運行速度比任何其他行星都快，僅需 88 個地球日即可完成一「年」。這項發明利用透鏡或反射鏡來收集光線，讓我們在自家後院就能看到月球上的隕石坑或土星美麗的環。這是宇宙中唯一已知有生命存在的地方。從太空中看，其廣闊的海洋賦予了它獨特的藍色，使它與乾燥的鄰居區分開來。衛星是繞行星運行的物體。由於引力的作用，我們的月球緊貼地球，在一個月內不斷改變其在天空中的外觀。每顆行星都遵循一條由太陽引力固定的特定隱形路徑。對於地球來說，完成這段旅程正好需要365天。這個遙遠而寒冷的世界呈現出美麗的深藍色。它繞太陽運行一圈需要很長時間——大約相當於地球的165年！雖然它看起來比夜空中的其他恆星大得多，但那只是因為太陽離我們更近。它提供了我們每天看到的陽光。這種罕見的現象發生在月球直接經過地球和太陽之間時，投下陰影，使白天的天空變暗幾分鐘。這顆行星的大氣層非常厚，像毯子一樣將熱量鎖在裡面。它的表面溫度極高，幾秒鐘內就能熔化一個鉛製玩具！雖然地球只有一顆衛星，但像土星和木星這樣的巨行星卻有幾十顆衛星繞著它們運行，就像一個微型太陽系。這顆行星呈淡青色，非常獨特，因為它是橫向自轉的。它是整個太陽系中最寒冷的地方之一。這種隱形的「拉力」來自太陽。由於太陽質量巨大，其引力足以讓所有八大行星保持在各自的軌道上運轉。這顆行星僅比我們的月球稍大一點！它是一個體積小、岩石構成的世界，因為它非常靠近明亮的太陽，所以很難被看見。到目前為止，人類只在月球上行走過。我們已經向火星派遣了許多機器人和探測器來拍照，但還沒有人訪問過這顆紅色星球。雖然從遠處看像是固體，但這些環實際上是由數十億個微小的水冰和塵埃碎片組成的，大小從沙粒到房屋不等。雖然我們的大氣層大部分是氮氣，但人類和動物需要這種特定的氣體才能生存。地球是唯一擁有足夠這種氣體供我們呼吸的行星。這個區域就像一個充滿數百萬個岩石碎片的宇宙墳場。它們是太陽系最初形成時留下來的殘骸。之所以給它這個名字，是因為它沒有固體表面；它主要由氫氣和氦氣組成，隨著深入，氣體會變得越來越稠密。水星和金星是「孤獨」的行星；它們根本沒有任何天然衛星繞其運行。大多數行星像陀螺一樣旋轉，但這顆行星像滾動的保齡球一樣旋轉。科學家認為很久以前可能有一個巨大的物體撞擊了它。我們的太陽系只是這座巨大恆星「城市」的一小部分。當你注視極其黑暗的夜空時，有時可以看到它呈現出一條模糊的、乳白色的帶狀光芒。大多數太空岩石在空氣中會完全燒毀，但如果有一塊足夠大，能在旅程中倖存並降落在地球表面，它就會獲得這個以「-ite」結尾的特殊名稱。如果你從太陽出發向外移動，順序是水星，接著是金星，然後是我們的家園：地球。這個「金髮姑娘」位置使我們保持在適合生命生存的正確溫度。當月球繞著我們的星球運行時，它無形的引力會「拉扯」地球的水，導致海平面每天上升和下降兩次。這艘小型太空船於 1977 年發射，比人類製造的任何其他物體都飛得更遠，並於 2012 年進入了恆星之間的空間。雖然四顆類木行星都有環，但這顆行星的環是由明亮的水冰組成的，能完美反射陽光，即使使用小型望遠鏡也清晰可見。地球每 24 小時繞著這條傾斜的線旋轉一次。正因為它是傾斜的，我們在一年中會經歷夏天和冬天等不同的季節。這顆行星在行星序列中緊隨地球之後。它以佈滿塵埃的岩石表面而聞名，是許多涉及機器人探測器任務的焦點。因為月球比地球小，它的引力要弱得多——只有大約六分之一。這意味著你會感覺輕得多，並且可以跳躍很遠的距離。You scored 0 out of 40You scored 1 out of 40You scored 2 out of 40You scored 3 out of 40You scored 4 out of 40You scored 5 out of 40You scored 6 out of 40You scored 7 out of 40You scored 8 out of 40You scored 9 out of 40You scored 10 out of 40You scored 11 out of 40You scored 12 out of 40You scored 13 out of 40You scored 14 out of 40You scored 15 out of 40You scored 16 out of 40You scored 17 out of 40You scored 18 out of 40You scored 19 out of 40You scored 20 out of 40You scored 21 out of 40You scored 22 out of 40You scored 23 out of 40You scored 24 out of 40You scored 25 out of 40You scored 26 out of 40You scored 27 out of 40You scored 28 out of 40You scored 29 out of 40You scored 30 out of 40You scored 31 out of 40You scored 32 out of 40You scored 33 out of 40You scored 34 out of 40You scored 35 out of 40You scored 36 out of 40You scored 37 out of 40You scored 38 out of 40You scored 39 out of 40You scored 40 out of 40
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太陽系是我們宏偉的宇宙家園，是由行星、衛星和恆星組成的集合體，千百年來一直令全人類著迷。從太陽的溫暖到火星的岩石表面，我們系統的每一部分都講述著一個獨特的故事。本測驗旨在測試你對我們稱為「家」的太空基本知識。無論你是初露頭角的觀星者，還是僅僅對天空感到好奇，這些問題都將引導你了解我們天體環境的基礎知識。讓我們來看看你對這些行星到底了解多少吧！