CG4 上帝之手
CG4 上帝之手
图中这个像爪型的物体,亦昵称「上帝之手」,是一种名为彗星状云球(Cometary Globule)的云气团。典型的彗星状云球有一个尘埃头和长长的尾部,看上去有点像彗星。不过它们是完全不一样的东西。彗星状云球一般会形成恒星,而彗星只是太阳系里细小的碎片而已。彗星状云球是银河系里独立而较小的尘埃气团。像图中这个位於船尾座,编号CG4的云球,距我们约1,300光年远。尘埃头直径约1.5光年,尾巴长约8光年。它拥有足够的物质可以制造几颗类似太阳大小的恒星。
尘埃头本身是不发光的,它全赖附近炽热的恒星所激发及照耀。这个云球的边缘发出暗暗的红光,是由於云球中的氢气被激发所致。这些能量辐射会渐渐摧毁尘埃头,改变它的形状,及扫走细小的尘埃而形成暗淡的蓝色反射星云。
这只「上帝之手」似乎正要吞噬前方的一个星系!不过这是不可能的,只是一个错觉。因为这个星系非常巨大,且离我们相当遥远,超过一亿光年。它们恰好在视角上在同一方向而已。
参考连结:
http://www.noao.edu/image_gallery/html/im1000.html
http://www.robgendlerastropics.com/CG4.html
http://tvdavisastropics.com/astroimages-1_00006a.htm
http://www.aao.gov.au/images/captions/aat071.html
http://www.universetoday.com/8028/cometary-globule-cg4/
http://www.skylook.org/apod/ap080901.html
http://www.skylook.org/apod/ap060314.html
CG4 上帝之手
LRGB,总曝光时间:12.3小时
TEC 180mm f/7.1, QSI-583 CCD
澳洲新南威爾士州,庫納巴拉布蘭。
尘埃头本身是不发光的,它全赖附近炽热的恒星所激发及照耀。这个云球的边缘发出暗暗的红光,是由於云球中的氢气被激发所致。这些能量辐射会渐渐摧毁尘埃头,改变它的形状,及扫走细小的尘埃而形成暗淡的蓝色反射星云。
这只「上帝之手」似乎正要吞噬前方的一个星系!不过这是不可能的,只是一个错觉。因为这个星系非常巨大,且离我们相当遥远,超过一亿光年。它们恰好在视角上在同一方向而已。
参考连结:
http://www.noao.edu/image_gallery/html/im1000.html
http://www.robgendlerastropics.com/CG4.html
http://tvdavisastropics.com/astroimages-1_00006a.htm
http://www.aao.gov.au/images/captions/aat071.html
http://www.universetoday.com/8028/cometary-globule-cg4/
http://www.skylook.org/apod/ap080901.html
http://www.skylook.org/apod/ap060314.html
CG4 上帝之手
LRGB,总曝光时间:12.3小时
TEC 180mm f/7.1, QSI-583 CCD
澳洲新南威爾士州,庫納巴拉布蘭。
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- CG4 上帝之手
- 20111223_CG4_47_9_9_9x10m_LRGB_2.jpg (346.97 KiB) 已瀏覽 7738 次
This is the object I told A/45 I am dreaming of to image, which is very challenging at our latitude, even if we are in Shui Hau. Nevertheless, it is still higher then Canopus!
After enjoying Angus' masterpiece, I think I can forget about imaging it due to the focal length of astrographs we are using.
After enjoying Angus' masterpiece, I think I can forget about imaging it due to the focal length of astrographs we are using.
Angus,
我不單只欣賞你拍的深空天體, 更喜歡簡淺但擁有無限知識的描述.
衹看看每次也有那十個八個參考資料, 便証明極盡用心和力求正確的精神.
Angus 你把香港天文攝影由純鑑賞水平, 提升至科普層次.
謝謝你的用心和毅力.
[恭喜樣] [恭喜樣]
Wongsir
2012-01-03
我不單只欣賞你拍的深空天體, 更喜歡簡淺但擁有無限知識的描述.
衹看看每次也有那十個八個參考資料, 便証明極盡用心和力求正確的精神.
Angus 你把香港天文攝影由純鑑賞水平, 提升至科普層次.
謝謝你的用心和毅力.
[恭喜樣] [恭喜樣]
Wongsir
2012-01-03
最後由 Wongsir 於 週二 03 1月, 2012 20:46 編輯,總共編輯了 1 次。
This is also one of my most wanted object! It is one of those objects which makes me appreciate how wonderful our universe is.Subaru 寫:This is the object I told A/45 I am dreaming of to image, which is very challenging at our latitude, even if we are in Shui Hau. Nevertheless, it is still higher then Canopus!
After enjoying Angus' masterpiece, I think I can forget about imaging it due to the focal length of astrographs we are using.
Unfortunately the making process of this image has been very difficult for me. Due to various reasons, most data I collected became unusable. Have to re-capture much of it again. Then encountered various problems during imaging processing. This version is already a slightly better one. Must revisit this object with a fresh eye sometime in the future.
What an amazingly, graphically dramatic object!Subaru 寫:This is the object I told A/45 I am dreaming of to image, which is very challenging at our latitude, even if we are in Shui Hau. Nevertheless, it is still higher then Canopus!
After enjoying Angus' masterpiece, I think I can forget about imaging it due to the focal length of astrographs we are using.
Now I see what you mean by a fish about to swallow a galaxy.
Simply profound under your magical eyes and hands Angus!
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