rjxie 发表于 2005-1-2 09:14

曼尼卡干陨星坑。(在航天飞机上拍摄)

Manicouagan Impact Crater
Credit: STS-9 Crew, NASA
Explanation: Manicouagan Crater in northern Canada is one of the oldest impact craters known. Formed about 200 million years ago, the present day terrain supports a 70-kilometer diameter hydroelectric reservoir in the telltale form of an annular lake. The crater itself has been worn away by the passing of glaciers and other erosional processes. Still, the hard rock at the impact site has preserved much of the complex impact structure and so allows scientists a leading case to help understand large impact features on Earth and other Solar System bodies. Also visible above is the vertical fin of the Space Shuttle Columbia from which the picture was taken in 1983.

柿饼 发表于 2005-1-2 14:43

请教:in the telltale form of an annular lake 为何意?    :?

rjxie 发表于 2005-1-2 14:55

请教:in the telltale form of an annular lake 为何意?    :?

在一个撞击形成的环行湖中。

柿饼 发表于 2005-1-2 15:33

谢谢!!
可是……

在一个撞击形成的环行湖中。

好像不是telltale的本义啊。所以刚才看到这里,我卡磕了。

rjxie 发表于 2005-1-2 16:57

谢谢!!
可是……

在一个撞击形成的环行湖中。

好像不是telltale的本义啊。所以刚才看到这里,我卡磕了。

telltale在这里的意思是:Something that indicates or reveals information; a sign.确需要你理解后意译。

柿饼 发表于 2005-1-4 14:12

:) perfectly thankful!

张瀚 发表于 2007-8-18 02:35

原帖由 wlhtwlm 于 2007-8-18 02:32 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
在那里啊,是地球上的吗

航天飞机好象还没飞远过

socket462 发表于 2007-8-19 20:15

这个坑远没有“东海”大。51°23'48.32"N、 68°38'25.50"W

milumon 发表于 2007-8-19 23:13

GE的图不清::yun2::
估计是地质勘察的卫星图吧::luguo::

ALMACH 发表于 2007-8-20 05:02

那里肯定是观星的好地方. 而且因为离北磁极很近, 所以我猜也应该是看极光的好去处

世界首穷 发表于 2007-8-20 05:29

好了,高清的截出来了,请欣赏!

http://www.astronomy.com.cn/bbs/attachments/month_0708/20070820_08b3f89a11ac94d159c55Lagrx138nsB.jpg
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