terrestrial planet

The finding contradicts the prevailing notion that a terrestrial planet needs a large moon to stabilize the orientation of its axis and , hence , its climate .

该发现跟一种流行的观念相抵触，这种观念认为类地行星需要一颗巨大的卫星来稳定行星轴的方向性，进而稳定其气候。

The SIM , in turn , will pave the way for the Terrestrial Planet Finder , to be launched late in the next decade , which should identify even more earth-like planets .

显然，执行者将为类地行星的寻找工作铺平道路，它计划在未来十年内发射，应该会发现更多的类地行星。

Earth is believed to have formed into a terrestrial planet 4.56 billion years ago when swirling space debris and gas clumped together .

当成漩涡状太空碎片聚集在一起的时候，地球被认为在45.6亿年前形成。

If such planets exist , these missions NASA 's Terrestrial Planet Finder and ESA 's Darwin should be able to scan their atmospheres for the presence of gases that would indicate the existence of life .

如果真的有这类行星存在，NASA的类地行星搜寻者，以及ESA的达尔文计画等任务，将得以探测它们的大气，寻找象徵生命存在的气体。

Traub says ," About one-third of FGK stars are predicted to have at least one terrestrial , habitable-zone planet . "

Traub说：“根据预测，大约三分之一的F，G或K类类恒星会至少有一个行星类似地球，拥有可居住区域。”

The terrestrial state of a planet consists in its position in relation to the horizon of the birth place , and is expressed by the planet 's presence in this or that house .

行星的陆地状态是指，其所在出生地地平线的位置和在不同宫位中表现出来的性质。

In order to reasonably explain the origin relation between meteorites , Earth and terrestrial planets , to discuss the Earth 's source and estimate earth 's bulk composition , it is necessary to set up a Petrological model for condensation process of solar nebula in terrestrial planet region .

建立类地行星区太阳星云凝聚过程的岩石学模型，对于合理解释陨石、地球和类地行星的成因关系，探讨地球起源和估算地球的整体成分都有着重要意义。