地球水量比太阳系其它星球少得可怜
文章来源:未知 文章作者:enread 发布时间:2016-10-28 07:53 字体: [ ]  进入论坛
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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。
 
 
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.
 
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.
 
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.
 
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.
 
In order of how much water they have, from the least to the most, they are: Enceladus, Dione, Earth, Europa, Pluto3, Triton, Callisto, Titan, and Ganymede.
 
Mimas, a moon of Saturn, and Ceres, the largest asteroid4 in the Solar System, are also thought to have subsurface oceans - but scientists aren't yet sure how big each one might be.


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1 Saturn tsZy1     
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 adc2876f632a087c0c8d7d68ab7543dc     
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 Pluto wu0yF     
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。
4 asteroid uo1yD     
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。
TAG标签: planet water earth
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