rjxie 发表于 2003-7-26 12:33

[酷图] 哈勃太空望远镜拍摄的旋涡星系NGC7742

Spiral Galaxy NGC 7742
Credit : Hubble Heritage Team (AURA/ STScI/ NASA)
Explanation: This might resemble a fried egg you've had for breakfast, but it's actually much larger. In fact, ringed by blue-tinted star forming regions and faintly visible spiral arms, the yolk-yellow center of this face-on spiral galaxy, NGC 7742, is about 3,000 light-years across. About 72 million light-years away in the constellation Pegasus, NGC 7742 is known to be a Seyfert galaxy - a type of active spiral galaxy with a center or nucleus which is very bright at visible wavelengths. Across the spectrum, the tremendous brightness of Seyferts can change over periods of just days to months and galaxies like NGC 7742 are suspected of harboring massive black holes at their cores. This beautiful color picture is courtesy of the Hubble Space Telescope Heritage Project.

mizar 发表于 2003-7-26 17:14

老大，这个我贴过呵---:D :D :D
我最喜欢的星系---:D :D :D

ak49 发表于 2003-7-26 18:20

看来楼上是个规规矩矩的人哦。。。。︿＿︿。

portiff 发表于 2003-7-28 20:34

看来坛主也喜欢

happyme 发表于 2003-7-28 20:40

很象鸽子的瞳孔么！

mizar 发表于 2003-7-29 17:02

我贴的是98年的一个每日一图----他们怎么又来一次？是又拍了一次吗？
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