太阳系其他星球水资源远胜地球 木星水量最大

 　　在太空放眼望去，地球这颗美丽的蓝色星球似乎在太阳系拥有得天独厚的优势，尤其是覆盖地表的大片大片的海洋资源，但事实上，据科学家研究发现，木星才是水资源最丰富的星球，相比太阳系其他星球，地球的水量少得可怜，连一颗小卫星的水资源都可以把地球比下去。

　　The next time someone asks you where the biggest ocean is, point them toward Jupiter. While Earth harbours about 320 million cubic miles (1,333 cubic km) of water, our planet is practically a desert compared to the rest of the Solar System.

　　下回有人问你哪个星球的海洋最宽广，你就说木星。尽管地球拥有3.2亿立方英里（1333立方千米）水资源，我们的星球相比太阳系的其他星球而言简直就是一片沙漠。

　　太阳系其他星球水资源远胜地球 木星水量最大

　　A moon of Jupiter called Europa, for example, which is roughly the size of our own Moon, likely hides a subsurface ocean with more than twice as much water as there is on Earth.

　　比如，木星的一颗名叫欧罗巴（木卫二）的卫星，体积和我们的月球差不多，可能隐藏着一片次表层海洋，水量是地球的两倍多。

　　Yet even that pales in comparison to Europa’s neighbour Ganymede; more than 30 times as much water as our home planet is thought to reside there as liquid and ice.

　　即便拥有这样的水量，木卫二相比邻星木卫三却是相形见绌；木卫三拥有的液态和固态水量超过了地球水量的30倍。

　　And scientists keep finding more water wherever they look. On September 28, researchers reported that Dione - a small moon of Saturn¹ - probably has a subsurface ocean, too.

　　而且，科学家还在不断发现水资源丰富的星球。9月28日，研究人员报告称，土星的一颗小卫星土卫四很可能也拥有一片次表层海洋。

　　To see just how Earth stacks up agains other ocean worlds, Business Insider contacted Steve Vance, a planetary scientist at NASA’s Jet Propulsion Laboratory who’s crunched² the numbers on just how much water might be out there.

　　为了弄清地球在太阳系海洋世界的实力，商业内幕网联系了美国宇航局喷气推进实验室的行星科学家史蒂夫?凡思，他运算出了其他星球的水量数据。

　　The to-scale graphic³ below uses Vance’s data to show the plausible⁴ volumes of water (both liquid and ice) for the nine ocean worlds verified so far:

　　下面的这张等比例绘制图运用凡思的数据显示出到目前为止已证实的太阳系九大行星海洋的理论水量（包括液态和固态水）：

　　In order of how much water they have, from the least to the most, they are: Enceladus, Dione, Earth, Europa, Pluto⁵, Triton, Callisto, Titan, and Ganymede.

　　按照拥有的水量排序，从少到多依次是：土卫二，土卫四，地球，木卫二，冥王星，海卫一，木卫四，土卫六和木卫三。

　　Mimas, a moon of Saturn, and Ceres, the largest asteroid⁶ in the Solar System, are also thought to have subsurface oceans - but scientists aren’t yet sure how big each one might be.

　　土星的卫星土卫一和太阳系最大小行星谷神星也被认为拥有次表层海洋，但科学家尚不能确定这两颗星球上的海洋有多大。

1 Saturn   

n.农神，土星

参考例句：

• Astronomers used to ask why only Saturn has rings.天文学家们过去一直感到奇怪，为什么只有土星有光环。
• These comparisons suggested that Saturn is made of lighter materials.这些比较告诉我们，土星由较轻的物质构成。

2 crunched   

v.嘎吱嘎吱地咬嚼( crunch的过去式和过去分词 )；嘎吱作响；（快速大量地）处理信息；数字捣弄

参考例句：

• Our feet crunched on the frozen snow. 我们的脚嘎吱嘎吱地踩在冻雪上。 来自《简明英汉词典》
• He closed his jaws on the bones and crunched. 他咬紧骨头，使劲地嚼。 来自英汉文学 - 热爱生命

3 graphic   

adj.生动的，形象的，绘画的，文字的，图表的

参考例句：

• The book gave a graphic description of the war.这本书生动地描述了战争的情况。
• Distinguish important text items in lists with graphic icons.用图标来区分重要的文本项。

4 plausible   

adj.似真实的，似乎有理的，似乎可信的

参考例句：

• His story sounded plausible.他说的那番话似乎是真实的。
• Her story sounded perfectly plausible.她的说辞听起来言之有理。

5 Pluto   

n.冥王星

参考例句：

• Pluto is the furthest planet from the sun.冥王星是离太阳最远的行星。
• Pluto has an elliptic orbit.冥王星的轨道是椭圆形的。

6 asteroid   

n.小行星；海盘车(动物)

参考例句：

• Astronomers have yet to witness an asteroid impact with another planet.天文学家还没有目击过小行星撞击其它行星。
• It's very unlikely that an asteroid will crash into Earth but the danger exists.小行星撞地球的可能性很小，但这样的危险还是存在的。