rjxie 发表于 2003-8-7 12:41

[酷图] 夜晚的帕洛玛山天文台。

http://antwrp.gsfc.nasa.gov/apod/image/0308/palomar200_redfern_full.jpg
Palomar at Night
Credit & Copyright: Greg Redfern (2003 JPL NASA Solar System Ambassador)
Explanation: What's wrong with this picture? The summer night sky is clear, and moonlight illuminates the dome of the Hale 200-inch Telescope at Palomar Observatory, northeast of San Diego, California, USA. The familiar stars of the Teapot asterism in the constellation Sagittarius shine above the dome and to the right. In fact, the only thing wrong with the picture is that the observatory dome's two massive shutters are closed tight ... on a clear night. This extremely unusual situation is a precaution prompted by the presence of airborne ash and smoke from wildfires in the area on July 17 which could have damaged the historic mirror's aluminum coating. Amateur astronomer Greg Redfern notes that this year has been a particularly bad one for observatories and wildfires, with the Siding Spring Australian Observatory disaster and fires also threatening telescopes on Mount Lemmon near Tucson, Arizona.

portiff 发表于 2003-8-7 16:01

旁边是什么星座，我看不出来

mizar 发表于 2003-8-7 19:49

好暗的图啊

Steed_Joy 发表于 2003-8-7 20:10

右边是人马座。

周熠君 发表于 2003-8-7 20:12

还有天蝎座尾巴上的一颗双星

孛沐 发表于 2003-8-8 01:14

好厉害！
请问一下如何判断呢？
谢……

Steed_Joy 发表于 2003-8-8 08:44

多观测几次就知道了,人马天蝎可是夏季星空的主力星座.

lymex 发表于 2003-8-8 14:32

是用Nikon E5700拍摄的，已经是不用快门线的极限了（ISO800、8秒、最大光圈2.8）。
如果用了快门线，可以曝光16秒而不至于把星点拉得过长。

光谱 发表于 2003-8-11 20:22

他们居然让黑尔望远镜闲着~
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