时间漩涡
(原标题: Time Spiral)
2024-07-01
浏览次数: 13
自从宇宙诞生以来发生了什么？这里显示的时间螺旋有几个值得注意的亮点。螺旋的中心是宇宙大爆炸，我们所知道的时间是在138亿年前开始的。在几十亿年的时间里原子形成了，然后恒星由原子形成，星系由恒星和气体形成，我们的太阳形成了，紧接着我们的地球也形成了，大约在46亿年前。地球上的生命大约始于38亿年前，接着是细胞，然后是10亿年内的光合作用。大约17亿年前，地球上的多细胞生命开始繁盛。鱼大约在5亿年前开始游泳，哺乳动物大约在2亿年前开始在陆地上行走。人类最早出现在大约600万年前，并在大约1万年前建造了第一批城市。上图所示的时间螺旋到此为止，但人类太空飞行可能会加入进来，它在75年前才开始，而有用的人工智能在过去几年才开始占据主导地位。探索你的宇宙：随机APOD生成器
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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 began 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