rjxie 发表于 2003-11-15 20:55

[酷图] 火星是否存在运河的争论

Mars Then and Now
Credit & Copyright: Tom Ruen, Eugene Antoniadi, Lowell Hess, Roy A. Gallant, HST, NASA

Explanation: Does Mars have canals? A hot debate topic of the late 1800s, several prominent astronomers including Percival Lowell not only claimed to see an extensive system of long straight canals on Mars, but used them to indicate that intelligent life exists there. The relatively close opposition of 1894 was used to make drawings like the one digitally re-scaled on the above left. The above map was originally prepared by Eugene Antoniadi and redrawn by Lowell Hess for the book Exploring Mars, by Roy A. Gallant. In more modern times, the latest Mars opposition has allowed the Hubble Space Telescope to capture a picture of similar orientation. Comparison of the two images shows that large features were impressively recorded, but that an extensive system of long and straight canals just does not exist. Satellites orbiting Mars have now shown conclusively that the red planet does indeed have surface features similar to canals, but that these are usually smaller, curved, and less extensive than that previously claimed. Real canyon systems like Noctis Labyrinthus are most likely cracks caused by surface stress.

HDZ 发表于 2003-11-15 21:13

他们是怎么看出有“运河”的？左边两幅照片我怎么也“看”不出有什么“暗线” ：）

Melipal 发表于 2003-11-16 10:55

想象力真丰富……不过我要是早点看到这图就好了……前些天英语课的演讲正好能用上……

starfriend 发表于 2003-11-16 19:55

不行

得再放大一点,这样勾勒会大一些,看的清楚!

zhangkj7068 发表于 2003-11-17 14:01

点击图片就能看见放大的图，放大后还是看不见。也就是说根本没有运河。

shistone 发表于 2003-11-22 23:01

这个问题都争论了十几年了！不到火星上去是不会有结果的.

nicklee92 发表于 2003-12-21 19:31

这是什么山哪？

:confused: em01.gif

ecxcn 发表于 2003-12-22 00:14

portiff 发表于 2003-12-22 17:31

伽利略怎么看出运河的,我咋看也看不出来

ak49 发表于 2003-12-26 01:09

伽，伽利略？

张铁之 发表于 2004-1-13 15:16

想象力真丰富
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