但是，与内行星的核心不同，月球的核心几乎不含铁，而典型的行星形成物质则富含铁。
But, unlike the cores of the inner planets, the Moon's core contains little or no iron, while the typical planet-forming materials were quite rich in iron.
好的，这就是波尔模型，波尔的原子模型是行星模型或者核心模型。
OK, this is the Bohr model, Bohr model of the atom is planetary or nuclear.
模拟显示，在冰层脱离之后，土星的引力将导致这颗卫星的硅酸盐核心的毁灭，将它越拉越近，最终撞向这颗行星。
After pulling off the ices, the gravity of Saturn would have doomed the moon's silicate core, tugging it closer and closer until it smashed into the planet, the simulation shows.
“如果你琢磨不受约束自由漫游的行星，想到它附近没有能够提供热量和能量的恒星……但即便在我们太阳系，都会有炙热的核心，更不用说那些寒冷的地方。”他说。
"If you think about free-floating planets, there's no nearby star that can produce heat and energy... but even in our solar system, there are [externally frigid worlds] that have hot cores," he said.
恒星高温的核心坍缩，并开始有规律的振动，最终气体外层迸散，为行星星云的形成提供了有利条件。
The hot core collapses and begins to pulsate, eventually shedding its outer layers of gas to set the stage for the birth of a planetary nebula.
科学家认为，水星的核心- -一个巨大的铁体，大约占整个行星的75%——帮助这个星球赢得密度奖。
Scientists believe that Mercury's core — an immense iron body that accounts for roughly 75 percent of the entire planet's mass — has helped the planet to win the density prize.
然而对Kepler - 10b的好奇与当年搜索太阳系内不存在的近核心行星颇有相似之处。
Kepler-10b, however, has some curious parallels with the solar system's non-existent innermost planet.
一个被称作‘连生’模型，指尘埃碎块经过数百万年的时间聚集形成了一颗行星的固体核心，之后它将周围的气体俘获据为己有。
In one - the 'accretion' model - small clumps of dust build up over millions of years to form a planet's solid core, which then pulls gases towards it.
太空升降机背后的核心理念包括降下一根电缆——也许是由小行星材料制成的，——从对地静止轨道到地球表面。
The central idea behind a Space Elevator involves lowering a cable — perhaps constructed from asteroid material — from geostationary Earth orbit to the surface of the Earth.
这本书以行星研究理论为核心，并用许多美丽的图像证明这些理论。
This book goes to the heart of current planetological research, and illustrates it with many beautiful images.
黑暗孪星没有液态核心，但曾有一段时间它的确也有液核，因为所有行星是从宇宙大爆炸的气体凝聚，然后液化，最终降温固化而成的。
The Dark Twin does not have a liquid core, but at one time did have this, as all planets coalescing from a Big Bang are first gaseous, then liquid, and then finally solidifying as they cool down.
拥有硅酸盐金属核心与冰质幔层的大量已分化小行星是最佳选择。
A large, differentiated satellite - with a core composed of silicates and iron, and a lighter mantle made of water ice - would be a good choice.
详细介绍了主动转向系统的结构和组成，以及核心部件双行星齿轮机构的工作原理及工作模式。
The structure and makeup of active steering system, the operating principle and operating mode of dual planetary gear mechanism are introduced in detail.
一些人说，因为看起来该行星在它形成的早期已经迅速冷却，它的核心已经固化，磁场只是留在岩石中的剩余部分。
Some say because the planet appears to have cooled rapidly early in its history, its core has solidified and any magnetic field is a remnant captured in rocks.
多法因的核心飞船载着格里弗斯将军离开行星表面，成为最晚撤退的核心飞船之一。
One of the last core ships to leave, Dofine carried General Grievous off the planet.
当然，宇宙星和行星有在我们的生活的影响，并且情感和这个事实筑堡垒于在行星和星的权威的运动的核心信仰。
Of course, stars and planets of universe have an influence on our lives and emotions and this fact fortifies the core belief in authoritative movement of planets and stars.
从来没有人弄清楚这个骗局的真正动机，然而银河系核心星域诸行星上逐渐散布的亲人类情绪，也许是这个小骗局的原因之一。
The motives behind the deception were never made clear; however the creeping pro-human sentiment among the Core Worlds could have been a factor.
大功率行星齿轮箱是水泥磨辊压机核心传动部件，其性能直接决定粉磨效果。
Planetary gear reducer is the key transmission part of the cement roller press. Its working status directly affect the forming of cement powder.
在星系核心附近可以看见行星密集，尘埃片片，星团璀璨。有人认为类似的星团和超大质量黑洞的形成有关。
A dense swarm of stars, patches of dust, and a bright star cluster are visible near the nucleus of the galaxy.
在星系核心附近可以看见行星密集，尘埃片片，星团璀璨。有人认为类似的星团和超大质量黑洞的形成有关。
A dense swarm of stars, patches of dust, and a bright star cluster are visible near the nucleus of the galaxy.
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