時間螺旋
Time Spiral
![image](https://apod.nasa.gov/apod/image/2407/TimeSpiral_Budassi_960.jpg)
發表日期:2024-07-01
宇宙誕生以來發生了什麼?這裡展示的時間螺旋有幾個值得注意的亮點。位於螺旋中心的是宇宙大爆炸,也就是我們所知的時間開始於大約 138 億年前的地方。在幾十億年內,原子形成,然後恆星由原子形成,星系由恆星和氣體形成,我們的太陽形成,不久之後,我們的地球也在大約 46 億年前形成。 地球上的生命開始於大約 38 億年前,隨後在 10 億年內出現了細胞和光合作用。 大約 17 億年前,地球上的多細胞生命開始繁衍。 大約 5 億年前,魚類開始游泳,大約 2 億年前,哺乳動物開始在陸地上行走。人類在大約 600 萬年前才首次出現,在大約 1 萬年前才建造了第一批城市。 時間的螺旋式上升到這裡就停止了,但人類的太空飛行可能在 75 年前才開始,而有用的人工智慧也只是在過去幾年才開始佔據主導地位。 探索你的宇宙隨機 APOD 生成器
原文:What's happened since the universe started? The time spiral shown here features a few notable highlights. At the spiral's center is the Big Bang, the place where time, as we know it, began about 13.8 billion years ago. Within a few billion years atoms formed, then stars formed from atoms, galaxies formed from stars and gas, our Sun formed, soon followed by our Earth, about 4.6 billion years ago. Life on Earth begins about 3.8 billion years ago, followed by cells, then photosynthesis within a billion years. About 1.7 billion years ago, multicellular life on Earth began to flourish. Fish began to swim about 500 million years ago, and mammals because walking on land about 200 million years ago. Humans first appeared only about 6 million years ago, and made the first cities only about 10,000 years ago. The time spiral illustrated stops there, but human spaceflight might be added, which started only 75 years ago, and useful artificial intelligence began to take hold within only the past few years. Explore Your Universe: Random APOD Generator
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。