It is an illustration of a planetary system, though a small one.
This means that we are facing an event at the level of planetary extinction.
Such libraries may even be interconnected into a single planetary library….
He was the first person accurately to measure the size of a planet.
Thus a further examination of the planet is nearly impossible.Combinations with other parts of speech
It is a way to characterize the level of development of a planet.我一直认为歌剧是一个行星,各种灵感在那里相互协作、携手颂扬所有的艺术。
I have always believed that opera is a planet where the muses work together, join hands and celebrate all the arts.".按照牛顿的力学定律,从来没有一个行星系统在它和另一个这样的系统碰撞以后能够回复它原来的位形。
No planetary system following the laws of Newton's mechanics would ever go back to its original configuration after a collision with another such system.一个行星有多热主要取决于距其宿主恒星有多近,以及这个宿主恒星有多热。
How hot a planet gets depends primarily on how close it is to its host star- and on how hot that star burns.要形成一个行星状星云,老化恒星的质量必须小于太阳的八倍。
For a planetary nebula to form, the aging star must have a mass less than about eight times that of the Sun.这是(几乎)一个行星的现实,它的H2O-或者至少97%的-是不可饮用的海洋。
That's(almost) the reality of a planet whose H2O- or at least 97 percent of it- is nonpotable ocean.人性化,已成为一个行星的力量,现在是塑造它自己的未来,数以百万计的生命物种的长远未来。
Humanity, having become a planetary force, is now shaping both its own future and the long-term future of millions of species of life.宇航员们相信在银河系的每个星球都有一个行星,它们中的五分之一可能有生命存在。
Astronomers believe that every star in the galaxy has a planet, and that one fifth of these might harbor life.任何人的35岁以上的会记得在只有一个行星系统被称为世界长大的-我们自己。
Anyone over the age of 35will remember growing up in a world in which only one planetary system was known- our own.K―PAX是一个行星”,他向他的医生解释道,“但别担心,我不会从你的胸口跳出来的。
K-PAX is a planet,'' he explains to his doctor,''but don't worry--I'm not going to leap out of your chest.''.然后他又把心,调用一个行星的名字,开始想象另一个的主要器官。
Then he took up the heart again, invoked the name of a planet, and set about dreaming another of the major organs.安提基奇拉机械装置对我有着特别的意义,因为它也是一个行星钟,而且它十分超前,领先那个时代几个世纪。
The Antikythera Device hasbeen of particular interest to me because it was also a planetary clock of sorts- centuries ahead of its time.这是一个行星比地球小,十倍可以看到其表面的曲线从足够远的时候。
It's a planet ten times smaller than Earth, and it's possible to see the curve of its surface when looking from far enough away.据了解,在一个行星系统中,恒星与绕其运动的行星大部分都是由相同的物质构成。
In a planetary system, the star and the planets that surround it are largely made of the same kind of material.有朝一日,我们可能会收到这样一个行星发来的信号,但我们在回答时应提高警惕。
One day, we might receive a signal from a planet like this, but we should be wary of answering back.他说:“在我看来,登陆另一个行星体是我们在这个领域所做的最艰难的事情之一。
Landing on another planetary body is in my opinion one of the toughest things that we do in our field.".所有这些剧变的高潮是一个行星文明的形成,物理学家称之为I型文明。
The culmination of all these upheavals is the formation of planetary civilization, what physicists call a Type I civilization.构思和执行作为一个伟大的工作,整个故事发生在一个行星轨道两个双星。
Conceived and executed as a Great Work,the entire story takes place on a planet that orbits two binary stars.我们是一个行星社区的一部分,同样值得丰度,幸福感和安心;
We are all part of one planetary community and equally deserve abundance, well-being, and peace of mind;那将是一个非常紧张的时刻,我们将目睹航天器降落在另一个行星上。
So it will be a very tense moment, you know,as we are watching that spacecraft landing on another planet.我们的太阳在约50亿年后也可能会产生一个行星状星云。
Our Sun will probably produce a planetary nebula in about 5 billion years.我们需要了解一个星球的太空天气环境,以了解一个行星是否适宜居住,”garcia-sage说。
We need to understand aplanet's space weather environment to understand whether a planet is habitable,” Garcia-Sage said.它告诉我们一个行星距离它的恒星有多远,也说明一个行星到底有多热。
It tells us how far away a planet is from a star, and that reveals how hot a planet is.
Before 1995,the solar system was the only one example of planetary systems we knew.