太空抽象画(M42的Orion 星云)
ABOUT THIS IMAGE:Close inspection of the 2006 Hubble Space Telescope color mosaic of the Orion Nebula (M42) reveals numerous treasures that reside within the nearby, intense star- forming region. Southwest of the Trapezium stars located in the center of the nebula, a stunning Hubble Heritage portrait captures a variety of intricate objects. Deeply contrasting areas of light and dark blend with a palette of colors mix to form rich swirls and fluid motions that would make even the best artists stand back and admire their work.Visible slightly above left center is the star LL Orionis (LL Ori), originally release by the Hubble Heritage Project in 2002. The delicate bow shock that surrounds LL Ori points towards the stream of gas flowing slowly away from the center of the Orion Nebula, near the Trapezium stars located off the image to the upper left. Close examination of the ends of the bow shock show secondary shocks that are formed as a two-sided jet of gas flowing away from this forming star at high velocity strikes the stream of low velocity gas from the center. To the right of LL Ori, a ghostly veil of material hangs thick and dark, obscuring portions of the nebula behind it.
The bright star toward the lower left of the image, known as LP Orionis (LP Ori), is surrounded by a prominent reflection nebula. Astronomers believe the star is moving within another veil of material that lies in front of M42. The appearance of the bright rim above LP Ori indicates that the teardrop shaped dark region around the illuminating star must be a cavity formed as the star moves through the veil material, rather than being a dusty veil obscuring light behind it.
Object Names: Orion Nebula, M42, NGC 1976
http://imgsrc.hubblesite.org/hu/db/2006/01/images/i/formats/print.jpg
[ 本帖最后由 寻找拉玛 于 2007-7-8 09:50 编辑 ] 来源:http://hubblesite.org/newscenter ... es/2006/01/image/a/
M42是位于猎户座的发射和反射星云，也就是著名的猎户座大星云。用肉眼看来，猎户座中构成“宝剑”的有三颗星，中间一颗是较模糊的亮斑，它不是单颗星，而是一个星云，这就是M42。它是一个有发射线的明亮弥漫星云。猎户座星云是猎户星协的核心，在星云的附近有许多恒星组成一个银河星团,称为猎户座星云星团,著名的“猎户座四边形”聚星就位于星云之中。在猎户座星云星团和猎户座四边形中，有许多表面温度高达几万度的热星，它们发出的强烈的紫外辐射使星云受到激发而产生辐射，因此星云的光谱主要是发射线。射电观测发现猎户座星云以每秒 8公里的速度离开猎户座星云星团。猎户座星云是一个非常年轻的天体，那里不但有许多年轻的恒星，而且还有许多星前天体。如1966年在猎户座星云中发现黑体温度只有600K的红外星，它可能是一个处于引力收缩中的原恒星,估计半径为8倍地球到太阳的距离,质量为6个太阳。不久，在离这个红外星不远的地方又发现一个黑体温度只有70K的红外星云，它的质
量可能为100～1000个太阳重量。后来在这些红外天体附近又发现了羟基和水分子辐射源。此外，在猎户座星云中还发现有一些球状体，它们的质量约为1个太阳，温度为10K左右，目前认为这也是处于引力收缩阶段的原恒星。几年前已观测到来自猎户座大星云的X射线。
在梅西叶于1769年3月4日为它编号之前，已经有人发现了它。M42是一个美丽的星云，是恒星诞生的摇篮，也是天文学家关注的对象。目前哈勃太空望远镜拍摄的高清晰图片，显示了星云的很多细节，使我们对恒星的起源有了一个初步的感性认识。
星协
某些恒星在天球上的分布有集结现象，这是一种互相之间有物理联系的恒星群。它们比星团稀疏得多,这样的恒星群称为星协。星协和年轻星团、四边形聚星有密切的关系,也常常与气体尘埃星云有物理上的联系。在银河系内，星协总是位于银河系的旋臂上。在星协中，虽然某一特定类型的恒星的密度很高，但总的恒星密度却低于周围星场。星协是不稳定的系统，已经发现几个星协在向外膨胀。
http://imgsrc.hubblesite.org/hu/db/2006/01/images/a/formats/print.jpg
[ 本帖最后由 寻找拉玛 于 2007-7-7 10:31 编辑 ] 这是局部图,来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/b/
http://imgsrc.hubblesite.org/hu/db/2006/01/images/b/formats/print.jpg
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:18 编辑 ] 这是局部图细节，来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/c/
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:19 编辑 ] 这是局部图细节，来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/d/
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:21 编辑 ] 这是局部图细节，来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/e/
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:15 编辑 ] 这是局部图细节，来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/f/
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:17 编辑 ] 这是局部图细节，来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/g/
[ 本帖最后由 寻找拉玛 于 2007-7-10 09:22 编辑 ] 来源:http://hubblesite.org/newscenter/archive/releases/2006/01/image/q/format/xlarge_web/
[ 本帖最后由 寻找拉玛 于 2008-1-5 14:32 编辑 ] http://www.dl-digital.com/images/Astronomy/Messier-Images/Combine-M42-MAX-layers3printpearl.jpg 来源:http://www.cpus.gov.cn/zlg/yuzhou/m42.htm
http://www.cpus.gov.cn/zlg/yuzhou/images/m-xilie/m42z.jpg 出处：www.galaxyphoto.com/jw_orion_new_mo.htm
http://www.galaxyphoto.com/high_res/jw_orion_ccd_film_sword.jpg 漂亮啊::hairsmile:: ::hairsmile:: ::hairsmile:: ::hairsmile:: ::hairsmile:: 强悍！！ 漂亮．．． piao liang !!!::yun1:: yct53.gif 在宇宙的杰作面前，任何画家都会自愧不如！ 宇宙真是超乎想像的美丽～ 有些图发过了，印象中第一、二张有了。 楼主好勤劳
顶！！！::0020::
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