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Ask Discover

机译:询问发现

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Q Supernovas produce most of the heavy elements, but what about non-element molecules, like water and ammonia and many others we find naturally on Earth? And how did these molecules survive the incredible temperatures and impacts when the planet was forming? A Most scientists believe that stable molecules like water and ammonia weren't originally produced on Earth. Instead, they arrived from space within the first 700 million years of Earth's existence. But how and when this happened still isn't clear. When Earth formed about 4.6 billion years ago, water was already present in some form in the universe. It coalesced through gravitational forces just like how larger structures - such as rocks, crystals and Earth itself - were forming.
机译:问:超新星产生大多数重元素,但是水,氨等非元素分子以及我们在地球上自然发现的许多其他元素呢?这些分子如何在行星形成时经受住难以置信的温度和冲击?大多数科学家认为,像水和氨这样的稳定​​分子最初并不是在地球上产生的。相反,它们是在地球存在的前7亿年内从太空到达的。但是这种情况的发生方式和时间尚不清楚。当地球大约在46亿年前形成时,宇宙中已经存在某种形式的水。它通过重力凝聚在一起,就像岩石,晶体和地球本身之类的较大结构的形成一样。

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    《Discover》 |2015年第7期|19-19|共1页
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