Such a big planet with a rocky core and a fluffy gaseous envelope probably can't support life as we know it.
如此大的一颗行星，有岩石地核以及蓬松的气体层包覆，可能不会维持我们所知的生命。
The fact that we now imagine our planet as a whole does not mean that the "rescue" of our planet will come with one big global stroke of genius and technology.
事实上，我们现在认为所在的星球是一个整体，这并不意味着对我们星球的“拯救”能靠着一次全球性的天才之举和技术就能实现。
Less than 20 years after first finding a planet beyond our solar system, astronomers are poised to hit a big milestone - the discovery of alien world no. 500.
首次发现太阳系以外的行星后不到20年，天文学家们正准备打造一个重要的里程碑——第500个外星世界的发现。
If a rocky planet is big enough - say, 10 times the mass of Earth - it can vacuum up so much hydrogen that its atmosphere ends up constituting most of the planet.
如果一个由岩石组成的行星足够的大——比方说，质量是地球的10倍——它可以吸收如此多的氢，以至于他的大气层最终会形成大部分的行星。
How we use those resources can make a big difference in determining the health of the planet, the well-being of others, even our own happiness.
而我们使用这些资源的不同方式将大大影响这个星球的健康，其他的人类，甚至我们自己的快乐。
If you want to know exactly how big a planet is, you need to know exactly how big the star is whose light it's blocking.
如果你想知道一个行星到底有多大，那么，你就要确切地知道那颗光线被阻断了的恒星体积的大小。
There are far easier pickings out there rather than landing on a planet filled with a civilization that takes great pride in building big weapons that could hinder attempts at mining the planet.
在那儿获取原料远比着陆在一个充满文明、对建造的能阻碍外星人采矿的大型武器引以为豪的星球上要容易得多。
If an asteroid that big struck Earth, firestorms could produce worldwide clouds of soot that would block sunlight and plunge the planet into an “asteroid winter.”
如果那么大的小行星袭击地球，引发的大火产生的烟尘会弥漫全球，遮蔽阳光，使地球进入“小行星冬天”。
But researchers can't know exactly how big the planet is unless they know the actual size of the star.
但是，研究人员还不能确切地知道地球有多大，除非他们知道的明星的实际大小。
Future observations will determine whether this is a planet or a brown dwarf, a gaseous body not big enough to begin the nuclear fusion process that makes stars shine.
进一步观测将会确定这是否是一颗行星，还是一颗褐矮星，即一个不够大，无法开始核聚变反应来发出光芒的气体星体。
The willows are access points, the Well of Souls and other places like it around the planet are like big servers, storage centers.
那些较小的柳树类似于存取点，而较大的灵魂之树像是巨大的服务器或储存中心。
It's thanks to institutions both big and small that people around the country are adopting this simple message of moderation and choice for their health and the health of the planet.
这得感谢大大小小的机构，全国各地的人们，为了自身和地球的健康，正采纳这一适度有选择的简单讯息。
This might suggest a giant planet, at least the size of Jupiter and maybe up to four times as big.
这也许意味着存在着一个巨大的星体，至少有木星那么大，或者更达到木星的四倍大小。
At Epcot the main attraction (that big giant Epcot ball) houses Spaceship Earth; a ride that takes you back through the history of our little planet.
在未来世界，最主要的景观（巨大的爱波皮卡球）内有太空船地球；星球历史之旅。
A big moon likely could have helped stabilize Mars' orbit, but the planet has just two small moons, most likely captured asteroids, that don't have much gravitational muscle.
一个月亮很可能帮助稳定火星的轨道，但是它也有两个小的卫星，很可能是被捕获的小行星，他们根本就没有足够的引力能束缚。
Hopefully Jobs's most important legacy will be that the products he created won't have too big of an impact at the end of their lives on either people or the planet.
但愿乔布斯最为宝贵的遗产是，他所创造的产品在报废使用前不会对人和地球产生太大的不良影响。
With operations in nearly every corner of the planet, Exxon always seems to get a seat at the table when big projects arise.
埃克森的业务几乎遍布世界各个角落，似乎在新项目出现时总能占有一席之地。
But the chance that we're on course to render big chunks of the planet uninhabitable sort of eclipses that.
但是按规定我们有机会提出“不适宜地球居住的大块”(big chunksofthe planet uninhabitable)等如同日食一样的提案。
Having such a powerful and energetic planet in this house is a big deal, and you haven't seen your ruler in this house in two years.
鉴于你的守护星已经有两年没有出现在这一宫了，因此这颗强大而有活力的行星现在出现是个大事件哦。
Scientists warned that the increase in big-eaters means more food production - a major cause of CO2 gas emissions warming the planet.
科学家警告说“大胃口”的人越来越多意味着需要更多的食物——这是导致二氧化碳气体让全球变暖的主要原因。
TWO years into its mission, NASA's planet-hunting Kepler space telescope has been a big success.
在2年的任务执行中，美国宇航局的行星搜索太空望远镜“开普勒”获得了巨大的成功。
Popular travel guide Lonely Planet warns travelers of the big chill, saying, "Temperatures are set so low you may find your extremities turning blue."
旅游指南LonelyPlanet警告旅行者称：“这里的空调温度非常低，你会发现四肢都要冻青了。”
Going to Coruscant is not such a big deal anymore, but going to a planet where there's an entirely different type of underwater, aquatic city... That's quite a chore.
去科洛桑已经不再是什么大事了，而前往一个有着全然不同类型的水下的星球、水中城市……那可真是件烦琐的事。
Congrats to fellow human beings on a big accomplishment. Hopefully we can all work together as a planet when it comes to outer space.
祝贺人类取得如此大的成就。希望在外太空开发方面，我们可以联合起来。
One big reason the picture looks fuzzy is that the star Fomalhaut is 100 million times brighter than its planet.
图片看起来模糊的一个重要原因是，恒星北落师门比其行星亮度高1亿倍。
Your plans for your home will get a big push forward once Jupiter, planet of good fortune, goes direct on December 25.
一旦象征着财富的木星在本月25日开始顺行，你的家庭计划将得到推进。
Let us consider that observer is sitting on a planet of Syrius. Which object is brighter one in "his sky": either our Sun or the stars of the Big Dipper?
译文：假设有一个观测者位于天狼星的一个行星上，在他看来我们的太阳和北斗七星中的恒星哪个更亮?。
Let us consider that observer is sitting on a planet of Syrius. Which object is brighter one in "his sky": either our Sun or the stars of the Big Dipper?
译文：假设有一个观测者位于天狼星的一个行星上，在他看来我们的太阳和北斗七星中的恒星哪个更亮?。
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