How were the heavy elements from iron to uranium made?
从铁到铀的重元素如何形成？
The fallout contained heavy elements and isotopes not found in nature.
放射性沉降物中含有非天然的重元素和同位素。
A large number of radioactive isotopes among the heavy elements are of three series.
重元素中的大量放射性同位素分别属于三个系列。
Among this group, most of those with traces of heavy elements also have traces of hydrogen.
这类白矮星中有着重元素痕迹者，大多也会有氢的痕迹。
The large number of radioactive isotopes among the heavy elements fit into three series .
重元素中的大量放射性同位素分属于三个系列。
Rare earth metals are often all found together, typically with far more light than heavy elements.
稀土元素通常是同时被发现的，一般来说轻稀土元素的数目远甚于重稀土元素。
Its stable isotopes are all end products of radioactive decay of uranium and other heavy elements.
其稳定的同位素为铀和其它重金属放射衰变后的最终产物。
Forged by the Milky Way's abundant stars, such heavy elements are the building blocks of terrestrial planets.
这些由银河系众多恒星锻造出的重元素正是类地行星的构建模块。
The team's measurement of thorium revealed the overall abundance pattern of heavy elements for this object.
该队的测量发现钍的总体格局丰富的重元素，为这个目的。
Petitjean and Scannapieco are working together on the clustering of heavy elements observed in quasar spectra.
佩提特金与史坎纳皮科正合作探讨类星体光谱中观测到的重元素群集现象。
These youngsters had low supplies of heavy elements-for example, their oxygen content was only 20 percent of the sun's.
这些年轻的恒星提供的重元素很少——例如，它们的含氧量仅为太阳的20%。
As time passes and stars continue to manufacture heavy elements, the balance everywhere will tilt in favor of carbon.
当时间一直流逝和恒星继续产生出重元素时，所有地方的碳比例都会增加。
Stars congregate most tightly at the galaxy's center, so the life-giving heavy elements they create are most plentiful there.
众多恒行最紧密地聚焦在银河系中心，因此它们创造出赋予生命的重元素在那里也最丰富。
"Stars in the center of the Milky Way are old and 'metal-rich' with a high abundance of heavy elements," Bobrowsky said.
银河中心的恒星都比较古老，富集金属元素，重元素的丰度很高。
Heavy elements are equally essential for life: Witness the oxygen we breathe, the calcium in our bones, the iron in our blood.
重元素同样是生活的必需品：其证据是我们呼吸的氧气、我们骨骼中的钙、我们血液中的铁。
Red giants are hot enough to turn the helium at their core, which was made by fusing hydrogen, into heavy elements like carbon.
红巨星的温度足够高，可以将其核心中由氢聚变成的氦再转变为重元素，比如碳。
Heavy elements have nuclei with large positive charges, which makes it more likely that they have strong spin-orbit coupling.
原子核中带有许多正电荷的重元素更有可能携带强烈的自旋轨道耦合。
A rapid succession of supernovae blasts material out of galaxies, injecting not only energy but also heavy elements into the IGM.
一系列相继出现的超新星将把物质炸离星系，同时把能量和重元素投入IGM。
Regions of the galaxy that are rich in heavy elements generally, such as the galactic center, have higher carbon-to-oxygen ratios.
在宇宙里一些含有大量重元素的地区如银河系中心里，一般都有较高的碳氧比例。
But most stars are not massive enough to create the pressures and heat necessary to burn heavy elements, so fusion and heat production stop.
不过大多数恒星都没有足够的质量以产生燃烧重元素所需的压力与热能，所以核聚变与热能产生过程都停止了。
The supernova explosions that create and spread heavy elements also unleash a torrent of high-energy radiation: gamma rays, X-rays, and ultraviolet light.
创造并散播重元素的超新星爆发同样释放出一股高能辐射的激流：伽玛射线，X射线，紫外线。
The rate at which massive stars form drops sharply as you venture outward from the Milky Way’s center, and the abundance of heavy elements falls with them.
你越往星系中心走，大质量恒星形成的难度就上升得越快，重元素的丰度也随之下降。
In the region where R136 sits, huge stars ignite and burn brief but brilliant lives before exploding as supernovas to seed the universe with heavy elements.
在R136 a所在的区域，巨大的恒星经历短暂而明亮的生命周期，爆炸成为超新星，同时增加了宇宙中重物质的成分。
For decades, scientists have known that supernovae, the explosive deaths of giant stars, trigger reactions to forge most of the heavy elements in the universe.
巨大的恒星在死亡时会产生超新星爆炸，所引发的反应，制造了宇宙中大多数的重元素，这是科学家几十年前就已经知道的。
Both light and heavy elements go into making LCD screens, compact fluorescent bulbs, and the strong permanent magnets used in hybrid car batteries and wind turbines.
原子量小的元素及原子量大的元素都将用于制造液晶显示屏、紧凑型荧光灯及混合动力车的电池与风力涡轮机所用的坚固永磁体。
Supernova remnants play an important role in stellar evolution by enriching space with heavy elements, and triggering new star formation by compressing interstellar gas.
超新星残骸以重元素填充宇宙空间，压缩星际气体促进新恒星的形成，因而在星体演化过程中扮演重要角色。
The relativistic density functional computational methods applicable to the calculation of systems containing heavy elements with high accuracy are simply reviewed.
对适用于含重元素体系的高精度相对论密度泛函计算方法作简要的评述。
A supernova not only blasts the heavy elements formed in the star out into interstellar space, but also initiates its own nuclear reaction, producing even heavier elements.
超新星不仅把恒星内形成的重元素抛入星际空间，而且它本身也会引发核反应产生更重的元素。
A supernova not only blasts the heavy elements formed in the star out into interstellar space, but also initiates its own nuclear reaction, producing even heavier elements.
超新星不仅把恒星内形成的重元素抛入星际空间，而且它本身也会引发核反应产生更重的元素。
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