[绝对酷图]73P彗星的“全明星”秀————太酷了！

Astrophotos: Comet Schwassmann-Wachmann's All Star Show

Thu, 11 May 2006 - Comets have always caused quite a stir throughout history. In the past, they were regarded as harbingers of misfortune and, in fact, our word "disaster" comes from the ancient belief in the calamitous influence of evil ("dis") stars ("astra"). Until slightly more than one hundred years ago, mankind lit their nights by burning wax, oils and gases so that the sky was very black after sunset except, as today, in large cities. Therefore, comets that suddenly erupted in the heavens appeared much more dazzling than they do now - beautiful, mysterious and, to some, terrifying! This weekend, Comet 73P/Schwassmann-Wachmann will make its closest approach to Earth at roughly 25 times the distance to the Moon. Its inward trek from the outer solar system has been the source of increasing excitement from modern day sky watchers around the globe but not from fear or worry. This comet has been an eagerly anticipated source of wonder!

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Comet Schwassmann-Wachmann overtakes M57. Image credit: Sean Walker and Sheldon Faworski;

                               
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Comets are the snow-birds of the solar system; living most of their lives in the dark outer reaches then taking a notion, due to a variety of gravitational influences, to visit the warmer climes near the Sun, which they also eccentrically orbit. In the process of drawing near the inner solar system, they let their hair down to blow in the solar wind (the word comet means "hairy star" in many languishes) like many pleasure-seeking tourists. Today, we find such visions captivating, in more ancient times these things looked scary!

Comet 73P/Schwassmann-Wachmann will not be remembered as a brilliant naked eye comet. Visual observers under very dark skies have reported that it can be seen without optical assistance but it is not at all spectacular. However, through a telescope it becomes evident that this comet is falling to pieces and is actually a host of small comets. As an added bonus, the comet has passed near or overtaken several famous deep space objects. These photo opportunites have resulted in the memorable images that accompany this article.

Sean Walker and Sheldon Faworski studied the comet's orbit and realized their Midwest imaging location in Elizabeth, Illinois, offered an opportunity to capture the comet very close to the Ring Nebula (M-57) earlier this week, during the final hours of May 8. They used a 14.5 inch Newtonian telescope and a 3 mega-pixel camera to capture this stunning image as the comet past directly over this popular planetary nebula in Lyra. Two separate images were combined to produce the final result- one of the comet and a separate one of the nebula. The comet was near the horizon when its picture was taken at 10:15PM CDT. 60 minutes of exposure were taken. The Ring Nebula image was captured earlier and represents three hours of exposure. The two pictures were then digitally combined.

Comet Schwassmann-Wachmann approaches M57. Image credit: John Chumack

                               
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John Chumack had his sights to also take a picture of the comet near the Ring Nebula and his imaging location in Yellow Springs, Ohio offered a similar perspective. His beautiful picture was obtained through a 16 inch Newtonian reflector with ST-9 SBIG astronomical camera when the comet was also low to the horizon. Three 30-second exposures through red, green and blue filters were combined to produce this picture of the comet as it approached M-57. More spectacularly, John created a short animation of the comet in motion as it flew over.

Several days before Comet 73P shot across the Ring Nebula, astro-paparazzi Nicolas Outters caught the comet sneaking past M13, the Great Globular cluster in Hercules. This dramatic picture was taken on May 4 from his Orange Observatory, situated between Geneva and Annecy, Switzerland at an altitude of 1068 meters. Nicolas used a four inch FSQ astrograph with a 6 mega-pixel camera over a four-hour period. He also assembled each of 45 images taken into an animated movie that shows the comet passing the famous globular cluster.

Comet Schwassmann-Wachmann visits M13. Image credit: Nicolas Outters

                               
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Do you have photos you'd like to share? Post them to the Universe Today astrophotography forum or email them, and we might feature one in Universe Today.

Written by R. Jay GaBany

来自：
http://www.astron.sh.cn/cgi-bin/topic.cgi?forum=3&topic=9161&show=0


PS： Shea 怎么不来牧夫了？

:shock:  :shock:  :shock: 很壮观哦!

有几张看不见

一共就3张图。。。还几张看不见。。。

星图也真厉害，这么老的图都能挖出来！

就是啊，这么早的。我还以为有73张图呢。好吧，我来翻译吧（貌似现在看见英语就想做翻译，都有病了）

Astrophotos: Comet Schwassmann-Wachmann's All Star Show
卫星图：施瓦斯曼-瓦赫曼彗星的全明星秀
Thu, 11 May 2006 - Comets have always caused quite a stir throughouthistory. In the past, they were regarded as harbingers of misfortuneand, in fact, our word "disaster" comes from the ancient belief in thecalamitous influence of evil ("dis") stars ("astra"). Until slightlymore than one hundred years ago, mankind lit their nights by burningwax, oils and gases so that the sky was very black after sunset except,as today, in large cities. Therefore, comets that suddenly erupted inthe heavens appeared much more dazzling than they do now - beautiful,mysterious and, to some, terrifying! This weekend, Comet73P/Schwassmann-Wachmann will make its closest approach to Earth at roughly 25 times the distance to the Moon. Its inward trek from theouter solar system has been the source of increasing excitement from modern day sky watchers around the globe but not from fear or worry.This comet has been an eagerly anticipated source of wonder!
2006.5.11星期四。施瓦斯曼-瓦赫曼彗星在其整个历史中总是造成相当大的轰动。在过去，它们曾是灾祸的先兆；事实上，英语中灾难（disaster）这个词就是由邪恶（dis）的星（astra）构成，因为古人笃信彗星是灾祸之源。现在的大城市夜空灯火阑珊，而仅仅在百年前人类用蜡烛、石油和煤气微微照亮夜空之前，太阳下山后的天空是一片漆黑。因此，当彗星突然在天空中展现其身姿时，它就远比我们现在所见的更美更神秘——也更恐怖。本周末，编号73P彗星（一般称为施瓦斯曼-瓦赫曼彗星）将运行到离地球最近的点，此时与地球距离大约25倍地月距离。随着它从外太阳系向太阳回归，全球的观测者逐步兴奋起来，预期这颗彗星会带来观测奇景！当然作为现代人，我们不会再对彗星感到担忧或恐惧。

PS:我的翻译是尽可能尊重原文的意译，我现在认为没有必要死套英文原词，毕竟两国的语言习惯是不同的。

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Comet Schwassmann-Wachmann overtakes M57. Image credit: Sean Walker and Sheldon Faworski;
彗星从M57行星状星云前飞过的照片（数字叠加的合成图）。图像创建者：Sean Walker ，Sheldon Faworski

Comets are the snow-birds of the solar system; living most oftheirlives in the dark outer reaches then taking a notion, due to avarietyof gravitational influences, to visit the warmer climes near theSun,which they also eccentrically orbit. In the process of drawing neartheinner solar system, they let their hair down to blow in the solarwind(the word comet means "hairy star" in many languishes) likemanypleasure-seeking tourists. Today, we find such visions captivating,inmore ancient times these things looked scary!
彗星是太阳系的雪鸿（怎么不说是企鹅、雷鸟什么的那类极地鸟——译注），绝大部分居住在未被我们关注的遥远的黑暗之地（越来越像邪恶之源了——译注）。由于（外轨道大行星等）引力摄动，它们（离开了长期稳定的运行轨道），以一个偏心率极大的轨道来到太阳附近的温暖之地。在通过内太阳系的路程中，受猛烈的太阳风吹拂，它们像大部分观光客一样被吹出一个（庞大的）彗发落在彗星后方。我们今天看到的如此迷人的美景，在古代人眼里，大部分是恐惧!
PS:个人认为此段中the word comet means "hairy star" in manylanguishes是个病句，最后一个词很可能写错了。从上下文看，应该是彗星在各地语言中的含义是扫帚星、多毛星、头发星的含义，而不该是“忧伤的”多毛星。此句未翻译，并不影响全段的理解。说实话，这些科普内容还有谁不知道呢。——译注
Comet 73P/Schwassmann-Wachmann will not be remembered as a brilliantnaked eye comet. Visual observers under very dark skies have reportedthat it can be seen without optical assistance but it is not at allspectacular. However, through a telescope it becomes evident that thiscomet is falling to pieces and is actually a host of small comets. Asan added bonus, the comet has passed near or overtaken several famousdeep space objects. These photo opportunites have resulted inthememorable images that accompany this article.
施瓦斯曼-瓦赫曼彗星不是作为肉眼可见的彗星被铭记。在极暗的夜空环境下，它能被肉眼发现但看不清全貌。然而，在望远镜下它变得相当清晰，事实上，它正分裂为一群小彗星。另外，彗星将靠近或从一些著名的深空天体前通过，这是一个难得的机会。本文的附图就是此时拍摄的一些值得纪念的图像。
Sean Walker and Sheldon Faworski studied the comet's orbit and realizedtheir Midwest imaging location in Elizabeth, Illinois, offered anopportunity to capture the comet very close to the Ring Nebula(M-57)earlier this week, during the final hours of May 8. They used a14.5inch Newtonian telescope and a 3 mega-pixel camera to capture thisstunning image as the comet past directly over this popular planetarynebula in Lyra. Two separate images were combined to produce the finalresult- one of the comet and a separate one of the nebula. The cometwas near the horizon when its picture was taken at 10:15PM CDT. 60minutes of exposure were taken. The Ring Nebula image was capturedearlier and represents three hours of exposure. The two pictures werethen digitally combined.
Sean Walker和Sheldon Faworski 研究彗星的轨道，并决定在美国中部的伊利诺斯州伊莉莎白县拍摄彗星图像。（这个地名我不熟悉——译注） 5.8夜的最后几个小时，施瓦斯曼-瓦赫曼彗星运行到与戒指星云M57非常近的天区。他们使用一个14.5"口径的牛顿望远镜和300万像素相机，获得了彗星在天琴座天区从我们熟知的行星状星云M57前穿过的震撼图像。2张独立的图合并为一张图——彗星和M57是各自单独曝光拍摄并叠加起来的。彗星摄于美国中部夏令时22：15，曝光时间1小时，此时彗星已接近地平线。戒指星云M57是早已经拍摄好的（文中未说明是前一天还是前几天拍摄的——译注），曝光时间3小时。然后2张照片经过数字叠加就成功了（把照片中的恒星对准了叠加，我们的许多星图都是这么拍摄的——译注）。

——gohomeman1

John Chumack had his sights to also take a picture of the comet near the Ring Nebula and his imaging location in Yellow Springs, Ohio， offered a similar perspective. His beautiful picture was obtained through a 16 inch Newtonian reflector with ST-9 SBIG astronomical camera when the comet was also low to the horizon. Three 30-second exposures through red, green and blue filters were combined to producethis picture of the comet as it approached M-57. More spectacularly,John created a short animation of the comet in motion as it flew over.
John Chumack也拍下了彗星接近M57的图像。他是在俄亥俄州耶洛斯普林斯市（也有译为黄泉市的，我觉得还是音译吧，毕竟这不过是一个城市名称而已——译注）采用类似的透视法拍摄的。他是使用一架16"牛顿望远镜+意法半导体工业集团出品的天文照相机获得这张美图的（器材比上面2位的更好——译注），彗星同样低垂于地平线附近。通过3次30秒的曝光，红、绿、蓝三色滤光照片合成出彗星接近M57的图像。更加令人吃惊的是，John 还制作了一段彗星的飞行动画。
PS:相对于前面那张，本图完全可算实时图了。

                               
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Comet Schwassmann-Wachmann approaches M57. Image credit: John Chumack
施瓦斯曼-瓦赫曼彗星接近M57星云。本图是三色叠加的实时图。——by gohomeman1.

真是高人啊，视场如此小，跟踪如此精确！

Several days before Comet 73P shot across the Ring Nebula,astro-paparazzi Nicolas Outters caught the comet sneaking past M13, the Great Globular cluster in Hercules. This dramatic picture was taken on May 4 from his Orange Observatory, situated between Geneva and Annecy,Switzerland at an altitude of 1068 meters. Nicolas used a four inch FSQ astrograph with a 6 mega-pixel camera over a four-hour period. He also assembled each of 45 images taken into an animated movie that shows the comet passing the famous globular cluster.
在彗星73P跨越M57前几天，天象摄影家（直译是天文狗仔队——译注）Nicolas Outters 拍下了彗星从球状星团M13附近溜过的图像。M13是位于武仙座的著名球状星团。这个戏剧性场面5.4摄于他自己的Orange天文台，Orange天文台海拔1068米，位于瑞士日内瓦市和法国安锡市之间。Nicolas Outters 使用了一台4"天体摄像仪和一个600万像素的数字相机，曝光4小时获得。他也制作了一个由45幅图像组成的动画，显示了彗星从M13附近通过的过程。

                               
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Comet Schwassmann-Wachmann visits M13. Image credit: Nicolas Outters

Do you have photos you'd like to share? Post them to the Universe Today astrophotography forum or email them, and we might feature one in Universe Today.
你是否想炫一下你的图片？给Universe Today论坛发e-mail或者投寄邮包给我们，我们很可能从中选出一个登在Universe Today上哦！

Written by R. Jay GaBany
本文作者：  R. Jay GaBany
翻译：gohomeman1，貌似作者把Annecy当做瑞士城市了。最后修改于9:51

瓦哦~~还要感谢gohomeman1的翻译哦1

太美了
什么时候可以自己拍到这样精彩的照片
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