1、The ancient Greeks believed that what we called thesolar system was in fact the entire universe, and that the universe was geocentric.(古希臘人堅信，我們所謂的太陽系實際上就是整個宇宙，并且宇宙以地球為中心。)
2、The space probe, Voyager I, launched in 1977, had sent back spectacular images of Jupiter and Saturn and then soared out of thesolar system on a one-way mission to the stars.(1977年發(fā)射的“旅行者一號”太空探測器發(fā)回了木星和土星的壯觀圖像，然后飛出太陽系，執(zhí)行前往恒星的單程任務(wù)。)
3、The spacecraft will enable scientists to study some dark corners of thesolar system.(太空船使得科學家可以研究太陽系中一些不為人知的角落。)
4、Thesolar system also has two analogous classes of objects, smaller than planets—namely, asteroids and comets.(太陽系也有兩類類似的物體，比行星還小——即小行星和彗星。)
5、That makes it the biggest known crater in oursolar system and it may well be the oldest.(這使它成為太陽系中已知最大的隕石坑，也可能是最古老的隕石坑。)
6、Why do scientists think something could be hidden beyond the edge of oursolar system?(為什么科學家認為某些東西可能隱藏在我們太陽系的邊緣之外？) (hao86.com好工具)
7、For more than 300 years, we thought Saturn was the only body in thesolar system with rings.(在300多年的時間里，我們一直認為土星是太陽系唯一擁有光環(huán)的天體。)
8、The orderly nature of oursolar system leads most astronomers to conclude that the planets formed at essentially the same time and from the same material as the Sun.(我們太陽系的有序特性使大多數(shù)天文學家得出結(jié)論，這些行星基本上在同一時間形成，且物質(zhì)來源和太陽的一樣。)
9、Jupiter, Saturn, Uranus, and Neptune. Those are the gas giants, the four heavyweights of thesolar system. But was there once a fifth?(木星、土星、天王星和海王星。這些都是氣體行星，是太陽系的四個重量級。但曾經(jīng)存在第五個行星嗎？)
10、They're basically made up of debris left over from the origin of thesolar system.(它們基本上是由太陽系起源時遺留下來的碎片組成的。)
11、The picture shows six of the nine planets in thesolar system.(這張圖片展示太陽系9個行星中的6個行星。)
12、Our planet Earth, together with other planets, revolve around our Sun in what is called oursolar system.(我們的行星地球，連同其他行星，圍繞我們的太陽旋轉(zhuǎn)，這就是我們的太陽系。)
13、They will serve as modern Magellans, mapping out thesolar system for whatever explorers follow, whether man or machine.(他們將作為現(xiàn)代麥哲倫人，繪制出太陽系的藍圖，無論探險者是人類還是機器。)
14、The goal was to measure the AU; then, knowing the orbital speeds of all the other planets around the Sun, the scale of thesolar system would fall into place.(目標是測量AU；隨后，當我們知道了所有圍繞太陽的其他行星的軌道速度，對太陽系的規(guī)模就有充分的認識了。)
15、Of course, we now know that the planets, including Earth, revolve around the Sun, and that thesolar system is only a tiny part of the universe.(當然，我們現(xiàn)在知道，包括地球在內(nèi)的行星都圍繞太陽公轉(zhuǎn)，而太陽系只是宇宙的一小部分。)
16、Far from the sun, in the outersolar system, beyond Jupiter's orbit, temperatures are low enough to permit ices to form out of water and out of gases like methane and carbon dioxide.(在遠離太陽的外太陽系，在木星軌道之外，溫度低到足以使冰從水以及甲烷和二氧化碳等氣體中形成。)
17、If thesolar system has an underachiever, it has to be Venus.(如果太陽系有一個后進生，那一定是金星。)
18、The Moon's spin and tilt are unique among other planetary bodies in thesolar system.(月球的自轉(zhuǎn)和傾斜在太陽系的其他行星體中是獨一無二的。)
19、Second, Jupiter's enormous mass prevents most Sun-bound comets from penetrating the innersolar system.(其次，木星的巨大質(zhì)量阻止了大多數(shù)與太陽結(jié)合的彗星穿透太陽系內(nèi)部。)
20、Saturn is the second biggest planet in thesolar system.(土星是太陽系的第二大的行星。)
21、The nearly circular orbits of planets in oursolar system led scientists to expect that planets around other stars would also reside in circular orbits.(在我們的太陽系中，行星的軌道幾乎是圓形的，這使得科學家們預(yù)測，其他恒星周圍的行星也會位于圓形軌道上。)
22、An estimated 99.85 percent of the mass of oursolar system is contained within the Sun, while the planets collectively make up most of the remaining 0.15 percent.(太陽占據(jù)了太陽系總質(zhì)量的大約99.85%，而在剩余的0.15%中，行星占據(jù)了大部分。)
23、Instead of normal planets whose composition could be predicted by theory, the planets populating oursolar system are unique individuals whose chemical and tectonic identities were create.(我們的太陽系中的行星不是那些可以通過理論預(yù)測其組成的普通行星，而是獨特的個體，它們的化學和構(gòu)造特征都是由它們創(chuàng)造的。)
24、Complex life evolved on the Earth's surface, but not on Mars or other planets in thesolar system because on those planets, early surface life was killed by UV radiation.(復(fù)雜的生命在地球表面進化，而不是在火星或太陽系的其他行星上，因為在那些行星上，早期的地表生命被紫外線殺死了。)
25、If we want to survive as a species, we have to expand into thesolar system and likely beyond.(如果我們希望作為一個物種生存下去，就必須擴張到太陽系之中或超越太陽系。)
26、In Astronomy, for example, the distinction between thesolar system and the universe wasn't clear until modern times.(例如，在天文學中，太陽系和宇宙兩者的區(qū)別直到現(xiàn)代才被弄清楚。)
27、I wanna go over the different types of meteorites, and what we've learned from them about the formation of Earth, and thesolar system.(我將介紹隕石的不同類型，以及我們能夠從中了解到的有關(guān)地球和太陽系的形成的知識。)
28、Other planets in oursolar system lack the oxygen atmosphere that helps explain why life exists on Earth.(我們太陽系的其他行星缺乏氧氣大氣層，這有助于解釋為什么地球上存在生命。)
29、This transformed our view not only of thesolar system but also of the importance of sending a spacecraft to Pluto.(這不僅改變了我們對太陽系的認識，也使我們意識到向冥王星發(fā)射飛船的重要性。)
30、The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in thesolar system—and extensive impact cratering.(火星表面顯示出廣泛的地質(zhì)特征，包括巨大的火山——太陽系中已知的最大的火山——和廣闊的撞擊坑。)
