不停改造的木卫一表面
[align=center][color=red][b]影像提供:[/b] [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://galileo.jpl.nasa.gov/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhrcZ00IVuiw0Sj8vnbs-f0vhm8mw][color=red]Galileo Project[/color][/url][color=red] , [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.jpl.nasa.gov/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhj2Vugff-TpA-1PwBSr489J3u1PYA][color=red]JPL[/color][/url][color=red] , [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.nasa.gov/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhi0fvXmFaSDpJW_K2JGkMFkcdwDBQ][color=red]NASA[/color][/url] [/align][img]http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/image/0808/iosurface_gal_big.jpg[/img]
[color=seagreen][b]说明:[/b]如同都市里的闹区、你日常开车去上班的道路、以及任何自重的[/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://antwrp.gsfc.nasa.gov/apod/ap_faq.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhiBYQOSMzZ01SF2u17_HQmlkrxMog][color=seagreen]网站[/color][/url][color=seagreen]一样， [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://en.wikipedia.org/wiki/Io_(moon)&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgskx20fx_HsLskYetYbA7VnAfLGA][color=seagreen]木卫一[/color][/url][color=seagreen]的表面一直不停地在改造。 [align=left]这颗木星的卫星，拥有太阳系火山活动最活耀天体的[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap961129.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjH9YyT4jcyWU0alk0PzaRDQf7qTg]头衔[/url] 。 [/align][align=left]它怪异的表面在岩浆流的影响下， [url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap001024.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhghGQ79w-r_-2zGg6YRJK2bwq7-ww]不停[/url]改变和再生。 [/align][align=left]这张[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://photojournal.jpl.nasa.gov/catalog/PIA00583&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhi1-pF3d3kpXqzqJmHqM-_NiuEZ0g]高解析度的组合影像[/url] ，是用伽利略号探测船在1996年所拍摄的数据组合出来的，影像呈现了永远背向木星那面的木卫一。 [/align][align=left]影像经过对比增强处理，以突显木卫一表面的亮度和颜色的变化，也呈现出小至2.4公里大小的表面结构。 [/align][align=left]木卫一表面看不到[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap960906.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgL-psSXjDMFLLjqdonqBmtlLsv2g]陨石坑[/url] ，这显示它表面火山沉积物的覆盖速率，远比陨石坑出现的速率要快。 [/align][align=left]不过，推动这种[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap960815.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhi79mmyzRcHnF23iDBKmdZ5iX9vNQ]火山活动的能源[/url]何在呢？ [/align][align=left]一种可能的来源是木卫一绕这颗大质量气态行星运行时，由木星和其他伽利略卫星所引起的潮汐效应。 [/align][align=left]潮汐作用为木卫一的[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.jpl.nasa.gov/galileo/status960503.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjHEht_Xlu-A1yCdualhXhSVRWt_w]内部加热[/url] ，推动主要喷出物是硫的[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap070918.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhix8byzUVuQj8Yd8c-x5ahaqLbMVQ]火山活动[/url] 。 [/color]::42:: ::42:: ::42:: [size=2][color=magenta](转自成大天文学教室)[/color][/size][/align]
[[i] 本帖最后由 zheng123 于 2008-8-18 05:59 编辑 [/i]] ::070821_09.jpg:: ::070821_09.jpg:: 看着有点恶心::070821_13.jpg:: 太清楚了，反而不好看！::070821_06.jpg:: 好图！！顶
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