2020年8月9日

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The Origin of Elements
Image Credit & License:
Wikipedia: Cmglee; Data: Jennifer Johnson (OSU)

Explanation: The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe. The carbon in your body was made by nuclear fusion in the interior of stars, as was the oxygen. Much of the iron in your body was made during supernovas of stars that occurred long ago and far away. The gold in your jewelry was likely made from neutron stars during collisions that may have been visible as short-duration gamma-ray bursts or gravitational wave events. Elements like phosphorus and copper are present in our bodies in only small amounts but are essential to the functioning of all known life. The featured periodic table is color coded to indicate humanity’s best guess as to the nuclear origin of all known elements. The sites of nuclear creation of some elements, such as copper, are not really well known and are continuing topics of observational and computational research.

Almost Hyperspace: Random APOD Generator

Tomorrow’s picture: leaking sky


化学元素从何而来
图片提供与授权:
Wikipedia: Cmglee; 数据提供: Jennifer Johnson (OSU)

说明: 你体内每颗分子里的氢,来自大爆炸。在宇宙中,除此之外没有其他重要的氢产生管道。你身体里的碳,是由恒星内部的核融合所产生,氧的来源亦同。你体内大部分的铁,是来自很久以前发生在远处的超新星爆炸。你珠宝里的金,可能是形成于中子星互撞的过程;这种事件,可能也产生了短期伽玛射线爆发或重力波事件。而你体内少量的磷及铜,是让所有已知的生命体得以运作之必要元素。上面的这张周期表,用色泽编码来呈现人类对所有已知元素来源的最佳猜测。然而,包括铜在内的一些元素,到底产生于那种核反应过程及形成于何处,目前并不全然清楚,至今仍然是观测和计算研究的题材。

几乎超空间:随机APOD生成器

明日的图片: leaking sky

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