最近，行星科学家提出，地球生物圈发展的外部先决条件可能包括四个最重要的偶发事件。
Recently planetary scientists have suggested that the external preconditions for the development of Earth's biosphere probably included four paramount contingencies.
行星科学家艾伦·斯特恩认为，国际空间站最大的公关推动力可能来自私人资助的太空飞行业。
According to Alan Stern, planetary scientist, the biggest public relations boost for the ISS may come from the privately funded space flight industry.
由于大多数行星科学家认为水是生命的基本要素，因此黄钾铁矾的存在意味着火星上曾经存在出现生命的先决条件之一。
Since most planetary scientists believe that water is essential to life, the presence of jarosite means that one prerequisite for life was once present on Mars.
他们把这一发现发表在杂志《地球和行星科学通讯》上。
They report the findings in the journal Earth and Planetary Science Letters.
上周梅里逊向在德国的欧洲行星科学大会提交了该项研究结果。
Merrison presented the results last week at the European Planetary Science Congress in Germany.
新证据可能将会改变行星科学家们看待火星的态度。
The new evidence likely will change the way planetary scientists view Mars. Pourmand, who is an assistant professor in marine geology and geophysics, said
萨拉·西格尔是麻省理工学院一名行星科学和物理学教授。
Sara Seager is a professor of planetary science and physics at the Massachusetts Institute of Technology (MIT).
行星科学家长期以来也曾将金星的贫瘠归咎于缺乏一个内部磁场。
Planetary scientists have also long blamed Venus's sterility on the lack of an internal magnetic field.
行星科学家们现在怀疑是不是还有更多这样的“热点”分布在太阳系里。
The recent discovery of the geysers on Enceladus added a second twist, making planetary scientists wonder if there are even more such hot spots scattered around the solar system.
约翰·格兰特(John Grant)是史密森尼学会的一名行星科学家。
John Grant is a planetary scientist with the Smithsonian Institution.
本周，在休斯顿附近召开的第41届月球与行星科学大会上，研究者们公开展示了这幅地图。
The researchers presented the map at this week's 41st Lunar and Planetary Science Conference near Houston.
桑塔·克鲁兹加州大学的行星科学家，佛朗西斯•尼姆说，最不朽的碰撞使得月球完全摇摆不定。
These monumental blows can literally set moons rocking, said researcher Francis Nimmo, a planetary scientist at the University of California at Santa Cruz.
在2月的第15期《地球与行星科学通讯》杂志上，一篇关于新发现钻石的报告中，费鲁瓦尔是主要作者。
Ferroir is the lead author of a report in the new diamond in the Feb. 15 issue of the journal Earth and Planetary Science Letters.
关于陨石的新研究将作为宇宙社会学期刊“宇宙和行星科学”杂志的主题之一——共20页——于本周出版。
The new meteorite research is featured in 20 papers published this week in an issue of the Meteoritical Society's journal Meteoritics and Planetary Science.
行星科学家们知道，水星密度极高——最可能的原因是相对于其它部分水星内核中铁含量非常巨大。
Mercury, planetary scientists knew, is uncommonly dense - most likely because its inner core of iron is very large relative to the rest of the planet.
一个困扰着行星科学家的问题是：海洋是怎样在像地球这样由硅酸盐和金属组成的石质行星的表面形成的？
One question that has baffled planetary scientists is how oceans formed on the surface of terrestrial planets like Earth — rocky planets made of silicate and metals.
他之所以能够学习行星科学，部分来自于一名魅力无穷的小学科学老师，部分是因为在佛蒙特州那清澈夜空下的成长经历。
His own inspiration to study planetary science came in part from an engaging elementary school science teacher and growing up under clear night skies in Vermont.
行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。
Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.
行星科学家在七月宣称两颗来自星团航天器的备选尘埃粒子，在宇宙收集了7年尘埃样本后于2006年回到地面。
In July, planetary scientists announced two candidate dust particles from the Stardust spacecraft, which returned to Earth in 2006 after seven years of collecting dust samples in space.
但最近进行的一项麻省理工学院的行星科学家的研究表明，星子(planetesimals)自己提供了形成海洋的水。
But a recent study by an MIT planetary scientist suggests that the planetesimals themselves provided the water that created oceans.
同位素地质年代学是测量年龄，利率，和历史或行星的地质资料的一门科学，运用这些见解的过程和现象可以了解地球与行星科学系。
Geochronology is the science of measuring ages, rates, and histories of geologic or planetary materials, and using these insights to understand processes and phenomena in earth and planetary science.
他和他的同事Anthony Ladd——一个在盖恩斯维尔的弗洛里达大学的化学工程师，在《地球和行星科学快报》的一篇论文中展示了他们新方程。
He and his colleague Anthony Ladd a chemical engineer at the University of Florida in Gainesville lay out their new equations in a paper to appear in Earth and Planetary Science Letters.
他和他的同事AnthonyLadd——一个在盖恩斯维尔的弗洛里达大学的化学工程师，在《地球和行星科学快报》的一篇论文中展示了他们新方程。
He and his colleague Anthony Ladd, a chemical engineer at the University of Florida in Gainesville, lay out their new equations in a paper to appear in Earth and Planetary Science Letters.
在行星科学领域，大量的资料搜集把一个又一个外来新世界展现在我们面前，其中又大约236个在本周被确认为系外行星——也就是太阳系以外的行星。
In planetary science the result is a menagerie of exotic new worlds,some 236 of which were this week confirmed as exoplanets—that is, planetsoutside the solar system.
我们好奇的想知道在可能的居住世界，我们真的不得不找一个月球吗？ “，来自于爱达荷大学的行星科学家JasonBarnes告诉探索新闻。”
We were wondering 'Do we really have to find a moon or not?' around potentially habitable worlds, planetary scientist Jason Barnes, with the University of Idaho, told Discovery News.
从重量为百万分之一克的样品中提取有关行星宏观组成的信息是一个极为有趣的科学尝试实例。
Extracting information about the large-scale composition of a planet from a sample weighing a millionth of a gram was a fascinating example of scientific endeavour.
科学家仔细察看行星照片，寻找生命迹象。
Scientists are studying photographs of the planet for signs of life.
科学家们在争论一颗小行星是否要撞上地球。
Scientists were debating whether an asteroid was about to hit the Earth.
在我们的太阳系中，行星的轨道几乎是圆形的，这使得科学家们预测，其他恒星周围的行星也会位于圆形轨道上。
The nearly circular orbits of planets in our solar system led scientists to expect that planets around other stars would also reside in circular orbits.
在我们的太阳系中，行星的轨道几乎是圆形的，这使得科学家们预测，其他恒星周围的行星也会位于圆形轨道上。
The nearly circular orbits of planets in our solar system led scientists to expect that planets around other stars would also reside in circular orbits.
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