rjxie 发表于 2005-1-26 22:02

NGC 6946——一个焰火星系。

NGC 6946: The Fireworks Galaxy
Credit & Copyright: T. Rector (U. Alaska Anchorage), Gemini Obs., AURA
Explanation: Why is this galaxy so active? Nearby spiral galaxy NGC 6946 is undergoing a tremendous burst of star formation with no obvious cause. In many cases spirals light up when interacting with another galaxy, but NGC 6946 appears relatively isolated in space. Located just 10 million light years away toward the constellation of Cepheus, this beautiful face-on spiral spans about 20,000 light years and is seen through a field of foreground stars from our Milky Way Galaxy. The center of NGC 6946 is home to a nuclear starburst itself, and picturesque dark dust is seen lacing the disk along with bright blue stars, red emission nebulas, fast moving gas clouds, and unusually frequent supernovas. The 8-meter Gemini North Telescope in Hawaii, USA, took the above image. A suggested explanation for the high star formation rate is the recent accretion of many primordial low-mass neutral hydrogen clouds from the surrounding region.

http://antwrp.gsfc.nasa.gov/apod/image/0501/ngc6946_gemini_big.jpg

筱_安 发表于 2005-1-27 22:58

哇,好棒哎,谢谢哦^^
如果可以帮忙翻译一下就好了 :mrgreen:  :mrgreen:  :mrgreen:

活动星图 发表于 2006-9-11 17:57

好帖，收进第一系列。

lyvia0206 发表于 2006-9-15 08:26

星空的旋律 发表于 2006-9-16 21:37

M33？

fraternite2006 发表于 2006-12-2 13:22

壮观！

蓝色飓风 发表于 2006-12-3 13:27

都快掉进去了！

活动星图 发表于 2006-12-3 13:31

它有这么大的引力吗？ :shock:

Alone狼 发表于 2006-12-3 14:14

漂亮！

Magician-KID 发表于 2006-12-3 17:02

赞！ :shock:

花楹 发表于 2006-12-5 16:42

老大的图就是不一样 ^^

southnoth 发表于 2006-12-15 00:48

超絕好圖
推 ^^

米茂沅 发表于 2006-12-26 20:30

冬天看这图，好，，

zuopeiwings 发表于 2006-12-31 12:07

多谢楼主！

爱在寒武纪 发表于 2007-9-15 21:56

说什么外文呀。
咱看不懂呀
::070821_20.jpg::
页: [1]
查看完整版本: NGC 6946——一个焰火星系。