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Glossary term: 宇宙

Description: 宇宙,包含空間、時間、物質、能量、物體、現象以及支配基本機制的定律。宇宙(universe) 在英文中還可以譯為“cosmos”,因為宇宙的所有方面都彙集在一個 "有序 "的系統中。當然,這兩個術語在技術上有細微的差別。宇宙源於拉丁語 universus。科學家描述的宇宙通常指可觀測的宇宙,“可觀測”一詞以強調目前的宇宙只可觀測和測量宇宙有限的範圍。

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
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This is an automated transliteration of the simplified Chinese translation of this term

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哈勃超深場顯示了約 10,000 個不同年齡、大小、形狀和顏色的星系。

哈勃極深場

Caption: 這幅令人驚嘆的圖像被稱為 "哈勃極深視場"(HUDF),是利用哈勃空間望遠鏡(HST),通過合併 HST 400 軌、 800 次曝光(相當於 11.3 天的總曝光時間)拍攝獲得的。 其中顯示了近 10,000 個星系,拍攝方向是視野中銀河系恆星數量最少的一片天空。HST 觀測到的天空區域相當於滿月在天球中大小的 1/10,大致相當於 1 米外約 1 毫米左右的物體。 除了圖片中間十字準線上的亮點之外,圖像中的每個物體都是星系。由於光速在真空中是一個常數,因此距離越遠的物體,我們觀測到的時間就越久遠。因此,哈勃極深場中一些星系發出的光來自宇宙只有幾億年歷史的時候。哈勃極深場引領我們進行了一次時空之旅。
Credit: NASA, ESA, and S. Beckwith (STScI) and HUDF Team credit link

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons

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