rjxie 发表于 2003-12-24 13:09

[酷图] 火星全球勘探者飞船拍摄的火星表面裸露地层的山丘。

Layered Hills on Mars
Credit: MSSS, JPL, NASA
Explanation: Why are some hills on Mars so layered? The answer is still under investigation. Clearly, dark windblown sand surrounds outcropping of light sedimentary rock across the floor of crater Arabia Terra. The light rock clearly appears structured into many layers, the lowest of which is likely very old. Although the dark sand forms dunes, rippled dunes of lighter colored sand are easier to see surrounding the stepped mesas. Blown sand possibly itself eroded once-larger mesas into the layered hills. Most of the layered shelves are wide enough to drive a truck around. The above image, showing an area about 3 kilometers across, was taken in October by the Mars Global Surveyor spacecraft currently orbiting Mars. Tomorrow, the first of three robot spacecraft from Earth is scheduled to arrive at the red planet.

三无 发表于 2003-12-24 15:32

照得真有艺术色彩！

我没看到上面的解说，还以为是抽象画呢！

ak49 发表于 2003-12-24 15:40

鬼斧神工。。。造化。。。。

lqidea 发表于 2003-12-27 23:27

好漂亮～

shistone 发表于 2003-12-31 17:52

那突出的应该是山峰或高地吧？
那周围都是象水冲击出来的一条条沟

北大楼 发表于 2012-6-9 16:38

顶

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