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Author Topic: 冥王星的卫星上,曾经是海洋  (Read 707 times)
sixiangzhe
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January 16, 2017, 01:22:03 PM
 #1

冥卫一上曾经的海
时间:2017-01-16 19:02:06来源:果壳网

本文作者:溯鹰
最近的科学研究推测,在冥王星的兄弟——冥卫一卡戎(Charon)的表面,或许曾有一片液态水的海洋。
这个消息或许会让你惊讶不已。要知道,冥王星的表面可是连氮气都会因为严寒而被冻结成冰的,与冥王星同样身处偏远的太阳系边陲地带的卡戎,又怎么会跟只能存在于温暖环境中的液态水扯上关系呢?
地球人经常念叨水是生命之源,可对太阳系来说,水,实在不算什么稀罕物件。就拿冥王星和卡戎的家乡——柯伊伯带来说,里面的大部分小天体,事实上都是一个个冻得梆硬的冰块。显然,太阳系边缘这些泛滥的冰坨坨并不是我们感兴趣的东西。太阳系最稀缺的东西,事实上是液态水,因为液态水有一个潜台词,就是它很可能代表着适宜生命存在的温度(按地球标准大气压来算,也就是0-100℃)。冰冷的宇宙中一旦出现这个温度阈值,对生命来说,简直是一个大写的奢侈了。
科学家靠什么推测出卡戎上曾有一片液态水的海洋呢?靠新视野号拍摄的遥感照片。从星球尺度看,卡戎的地理格局其实很简单,南半球相对平坦,北半球则相对崎岖。两者的交界线,是一片东西走向的深谷群,由东向西,分别是Mandjet深切谷和Serenity深切谷,以及位于最西侧、走向逐渐往南北方向转换的Argo深切谷。
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tiaozhanziwo
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January 16, 2017, 01:26:35 PM
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冰冻的水似乎对生命无作用,要有液态的水才有生命的存在。
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January 17, 2017, 03:54:53 AM
 #3

科技可以让冰冻的水融化,那时就可以住人了。
yifeichongtian
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January 18, 2017, 12:10:02 AM
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都在寻找可住人的星球,我们也该珍爱自己的星球。
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January 18, 2017, 01:37:55 AM
 #5

人类在一步步的探索中

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sixiangzhe
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January 19, 2017, 03:17:53 PM
 #6

探索才有进步。
zhangswujip
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January 20, 2017, 05:07:51 AM
 #7

探索无极限,宇宙的奥秘不知道得多少年才能挖掘
Obfuscode
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January 21, 2017, 12:49:52 PM
 #8

没有液态水没用吧
knowitnothing
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January 21, 2017, 04:47:00 PM
 #9

沧海桑田了
Jenny Moll
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January 24, 2017, 12:49:30 PM
 #10

沧海桑田能回到从前吗?
yifeichongtian
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January 25, 2017, 02:15:34 AM
 #11

希望能找到有水的星球
pandajunny
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January 26, 2017, 02:32:45 PM
 #12

别东想西想了,好好保护好地球吧
foob6
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January 27, 2017, 01:25:16 PM
 #13

不知道还有没有其他星球有生物的
wood7
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January 27, 2017, 03:43:17 PM
 #14

有氧气才行吧
wendy5
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January 28, 2017, 03:47:06 AM
 #15

不是说火星上曾经也是海洋么
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