标签:行星旅行指南 相关文章
All houses are unique. Even if they look the same from the outside, they are very different on the inside. I think houses are very interesting. I like looking at the way they are built and the style they are built in. In London there are many houses
A hypervelocity star appears to be the remains of a three-star system, one star of which was digested by the Milky Way's black hole, with the other two being combined and hurled away. Heres what scientists think happened, oh, about a hundred million
For the first time ever, astronomers have discovered a system of seven Earth-sized planets orbiting around a single star. The finding was announced Wednesday by officials from NASA the U.S. space agency and other research team members. The discovery
US Space Agency Expands Search for Distant Planets Able to Support Life The search for worlds orbiting distant stars will intensify in the coming weeks when the American space agency NASA launches a spacecraft. Scientists hope the spacecraft will enl
Orbit 轨道 Do you know what an orbit is? 你知道什么是轨道吗? An orbit is the path of a planet when it moves around the sun. 轨道是行星围绕太阳运动的轨迹。 It is similar to a cycling track. 它类似于自行车赛道。 As
Mercury 水星 Which planet is the closest to the sun in the solar system? 太阳系中哪颗行星离太阳最近? It is Mercury. It is also the smallest planet in the solar system. 水星。它也是太阳系中最小的行星。 How small is Mer
And in fact, Curiosity -- which has been roving on the surface now for about three years -- 事实上,好奇号探测车,在火星表面上漫游已经有三年了 has really shown us that it's sitting in an ancient river bed, where water flowed
Why? We look at the inner planets. 为什么?让我们看看太阳系的行星: Venus is way too hot -- it's got no water. 金星太热所以没水。 Mars -- dry and arid. It's got no water. 火星干旱贫瘠,也不会有水。 And beyond Mar
Is there life beyond Earth in our solar system? 在地球以外,太阳系里还有生命吗? Wow, what a powerful question. 哇,多么掷地有声的问题! You know, as a scientist -- planetary scientist -- we really didn't take that very se
Cassini just a few months ago also flew through the plume, and it measured silicate particles. 卡西尼太空船几个月前又从这些飞溅的水流中穿过,它检测到了硅酸盐颗粒。 Where does the silica come from? 这些硅从哪来的
Another moon that we're looking at is Titan. 我们在研究的另一个卫星是土卫六。 Titan is a huge moon of Saturn. 土卫六是土星的一个非常大的卫星。 It perhaps is much larger than the planet Mercury. It has an extensive atmo
Another moon, very similar, is Europa. 另一个非常相似的卫星,木卫二。 Galileo visited Jupiter's system in 1996 and made fabulous observations of Europa. 伽利略号在1996年时探访了木星系统,对木卫二进行了详细的观察
Planet earth never attempted to land on such a distant world before. With Huygens probe on final approach to Titan, operations switch to European mission control. The probe hurtled into Titans atmosphere at 6km a second, the atmosphere would have bee
manganese n. 锰(元素符号为Mn) mantle composition 覆盖物的成分 Mercury n. 水星 molten v. 溶化;adj. 熔铸的 monitor n. 监视器,监控 mudflow n.[地] 泥流 Neptune n. [天]海王
An asteroid hurtled past Earth. It was 13 times closer to Earth than the moon is. Then a huge meteorite exploded above a city in Russia. The shock wave shattered thousands of windows. Then a white fireball over San Francisco startled witnesses. Then
Oxygen itself is not combustible; it merely facilitates the combus tion of other things. (氧本身是不可燃的,它只是帮助别的东西燃烧。 This is just as well, for if oxygen were corn bustible, each time you lit a match all the air
The Romans also flavored their wine with lead, which may be part of the reason they are not the force they used to be. 罗马人也用铅来给酒调味,这也许是他们不再像以往那样强大的部分原因。 As we have seen elsewhere, our
We have evolved to utilize or tolerate these thingswe could hardly be here otherwise but even then we live within narrow ranges of acceptance. 我们已经逐步学会利用或忍受这些东西要不然我们几乎不可能在这里但即使那样,我
The figures have since been refined and made a little more generous, 自那以后,这两个数字被更精确地测算了一遍,放宽了一点, 5 percent nearer and 15 percent farther are thought to be more accurate assessments for our zone of
Under its influence divers had been known to offer their air hoses to passing fish or decide to try to have a smoke break. 据知,在氮的影响下,潜水员会把自己的空气管扔给从身边游过的鱼,或决定抽支烟歇息片刻。