2024年12月28日:十二月的冬夜-（A December Winter Night） 2024年12月28日:十二月的冬夜-（A December Winter Night）--原图下载{mtitle title="十二月的冬夜"/}Image Credit &Copyright:Włodzimierz Bubak说明: 在这幅深空影像里，猎户座看似躺着从远方的山脉后方升起。这片冬季景观则是摄于波兰南部，时值北半球漫长的冬至夜。影像里，原本肉眼难以见到的星云，在透过改装配备氢α红色滤镜的相机取像后，而得以显现。这些位于猎户分子云边缘的星云，有猎户座熟悉的腰带三星、明亮的巨星参宿四及参宿七为伴。 而影像中上方的金牛眼睛、色泽泛黄的毕宿五，为V形毕宿星团的定锚天体。除此之外，位于冲附近的木星、这颗太阳系最大的气态巨行星，则是雪峰上空最明亮的天体。{lamp/}原文：{mtitle title="A December Winter Night"/}Image Credit &Copyright:Włodzimierz BubakExplanation: Orion seemsto come up sideways,climbing over a distant mountain rangein this deep skyscape.The wintry scene was capturedfrom southern Poland on the northern hemisphere'slong solstice night.Otherwise unseen nebulae hang in the sky,revealed by the camera modified to recordredhydrogen-alpha light.The nebulae lie near the edge of the Orion molecular cloud andjoin the Hunter'sfamiliar belt starsand bright giants Betelgeuse and Rigel.Eye of Taurus the Bull, yellowishAldebaran anchorsthe V-shaped Hyades star cluster near top center.Still, near opposition in planet Earth's sky,the Solar System'sruling gas giantJupiter is the brightest celestial beaconabove this horizon's snowy peaks.

2024年01月16日:肉眼几乎可见的猎户座-（The Orion You Can Almost See） [2024年01月16日:肉眼几乎可见的猎户座-（The Orion You Can Almost See）--原图下载](https://apod.nasa.gov/apod/image/2401/OrionMcc_Guzzini_1366.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2401/OrionMcc_Guzzini_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2401/OrionMcc_Guzzini_960.jpg';){mtitle title="肉眼几乎可见的猎户座"/}Image Credit & Copyright: Michele Guzzini说明: 你认得这个星座吗？儘管它是天空中最容易辨认的星群之一，但这种与肉眼所见比较更加完整的猎户座，只有透过长曝光数位相机成像及电脑后製处理才得以显现。在此影像里，带着深橙色调的低温红巨星参宿四，是位于左上角的最明亮恒星。猎户座的炽热泛蓝恒星数量众多，其中，右下角的超巨星参宿七，亮度足以和左上角的参宿四相抗衡，而右上角的亮星则是参宿五。距离我们全约为1,500光年远的猎户腰带三星，皆诞生于猎户座备受研究的星际云里。猎户腰带下方有一片明亮但模糊的光斑，它看来或许也有点眼熟，这是因为它是名为猎户大星云的恒星孕育室。最后是肉眼勉强可见但相当引人注目的巴纳德环，这团环拱在猎户腰带和猎户大星云周围的庞大发射星云，是由猎户座摄影先锋巴纳德发现于100多年前。（Betelgeuse 参宿四; Rigel 参宿七; Bellatrix 参宿五; Barnard's Loop 巴纳德环; Hatysa 伐三; Alnitak 参宿一; Alnilam 参宿二; Mintaka 参宿三; Saiph 参宿六; Cursa 玉井三-波江座）{lamp/}原文：{mtitle title="The Orion You Can Almost See"/}Image Credit & Copyright: Michele GuzziniExplanation: Do you recognize this constellation? Although it is one of the most recognizable star groupings on the sky, this is a more full Orion than you can see -- an Orion only revealed with long exposure digital camera imaging and post-processing. Here the cool red giant Betelgeuse takes on a strong orange tint as the brightest star on the upper left. Orion's hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse on the lower right, and Bellatrix at the upper right.Lined up in Orion's belt are three stars all about 1,500 light-years away, born from the constellation's well-studied interstellar clouds.Just below Orion's belt is a bright but fuzzy patch that might also look familiar -- the stellar nursery known as Orion's Nebula. Finally, just barely visible to the unaided eye but quite striking here is Barnard's Loop -- a huge gaseous emission nebula surrounding Orion's Belt and Nebula discovered over 100 years ago by the pioneering Orion photographer E. E. Barnard.

2023年10月10日:韦伯影像：藏在猎户大星云里的天体-（Hidden Orion from Webb） [2023年10月10日:韦伯影像：藏在猎户大星云里的天体-（Hidden Orion from Webb）--原图下载](https://apod.nasa.gov/apod/image/2310/OrionNircShort_Webb_2048.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2310/OrionNircLong_Webb_960.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2310/OrionNircShort_Webb_960.jpg';){mtitle title="韦伯影像：藏在猎户大星云里的天体"/}Image Credit & License: NASA, ESA, CSA, JWST; Processing: M. McCaughrean & S. Pearson说明: 猎户大星云内有隐不可见的恒星。在只能感侧可见光的肉眼里，它看起来像是猎户座内的弥漫小光斑。不过，这幅来自韦伯太空望远镜的代表色影像，是由摄于红光和近红外光的数据组合而成。因此它无比清晰的证实，猎户大星云是个由年轻恒星、炽热气体和黝黑尘埃织就的忙碌区域。而轮替影像所呈现的，则是同一区域在更长波长的近红外光之代表色影像。驱动猎户大星云（M42）的主要能量源，是位在星云中心的那群亮星所属的四边形星团。而这些亮星周围的弥漫丝缕状晕光，主成分是受热的星际尘埃。在仔细检枧这些影像之后，出乎意外的找到大量木星质量级的双天体系统（JuMBOs），而这些成对的双木系统，或许能为了解恒星到底是如何形成的提供线索。此外，包括马头星云在内的整个猎户大星云複合体，于未来的数百万年里会缓缓的消散匿蹤。{lamp/}原文：{mtitle title="Hidden Orion from Webb"/}Image Credit & License: NASA, ESA, CSA, JWST; Processing: M. McCaughrean & S. PearsonExplanation: The Great Nebula in Orion has hidden stars. To the unaided eye in visible light, it appears as a smallfuzzy patch in the constellation of Orion.But this image was taken by the Webb Space Telescope in a representative-color composite of red and very near infrared light. It confirms with impressive detail that the Orion Nebula is a busy neighborhood of young stars, hot gas, and dark dust. The rollover image shows the same image in representative colors further into the near infrared.The power behind much of the Orion Nebula (M42) is the Trapezium - a cluster of bright stars near the nebula's center. The diffuse and filamentary glow surrounding the bright stars is mostly heated interstellar dust. Detailed inspection of these images shows an unexpectedly large number of Jupiter-Mass Binary Objects (JuMBOs), pairs of Jupiter-mass objects which might give a clue to how stars are forming. The whole Orion Nebula cloud complex, which includes the Horsehead Nebula, will slowly disperse over the next few million years.

2023年09月26日:IC 4592：蓝马头反射星云-（IC 4592: The Blue Horsehead Reflection Nebula） 2023年09月26日:IC 4592：蓝马头反射星云-（IC 4592: The Blue Horsehead Reflection Nebula）--原图下载{mtitle title="IC 4592：蓝马头反射星云"/}Image Credit & Copyright: Antoine & Dalia Grelin说明: 你看到马头了吗？你见到的不是猎户座着名的马头星云，而是另一个只有在较深空影像里，形似马头的外观才会显现的昏暗星云。这张影像所呈现的分子云複合体的主体，是编录号为IC 4592的反射星云。反射星云是由微小的尘埃所组成，正常情况下看起来很黝黑，不过如果它反射附近炽热恒星的可见光，色泽却可能变得很蓝。在上面这个案例里，大部分受到反射的星光，是源自位于马 眼的恒星。 这颗恒星是尾宿九（Nu Scorpii）的成员星之一，而尾宿九则是天蝎座数个明亮多合星系统之一。在影像的中右方，可以看见环拱着2颗恒星、名为IC 4601的第二个反射星云。{lamp/}原文：{mtitle title="IC 4592: The Blue Horsehead Reflection Nebula"/}Image Credit & Copyright: Antoine & Dalia GrelinExplanation: Do you see the horse's head? What you are seeing is not the famous Horsehead nebula toward Orion, but rather a fainter nebula that only takes on a familiar form with deeper imaging. The main part of the here-imaged molecular cloud complex is reflection nebula IC 4592. Reflection nebulas are made up of very fine dust that normally appears dark but can look quite blue when reflecting the visible light of energetic nearby stars. In this case, the source of much of the reflected light is a star at the eye of the horse. That star is part of Nu Scorpii, one of the brighter star systems toward the constellation of the Scorpion (Scorpius). A second reflection nebula dubbed IC 4601 is visible surrounding two stars above and to the right of the image center.

2022年12月29日:马头与火焰星云-（Horsehead and Flame） 2022年12月29日:马头与火焰星云-（Horsehead and Flame）--原图下载{mtitle title="马头与火焰星云"/}Image Credit &Copyright:Jason Close说明: 在这幅清晰星空影像里，明亮背景发射星云上的黝黑暗斑，是亦名为巴纳德33的着名马头星云。位于猎户座方向约1,500光年远处的马头星云，高度在5光年左右。在此区富饶分子云複合体内的这大片不透光尘埃，从银河系我们所在的位置看出去，恰好拥有我们很熟悉的形状。影像中左方的亮星，则是猎户腰带最东侧的参宿一。来自参宿一的高能紫外光，更激发其下方满是尘埃的NGC 2024（火焰星云）发出明亮的辉光。完善这个色泽对比範例的天体，还有马头星云下方的泛蓝反射星云NGC 2023。这片取景佳妙的望远镜视野，大约涵盖了3个满月宽度的天区。{lamp/}原文：{mtitle title="Horsehead and Flame"/}Image Credit &Copyright:Jason CloseExplanation: The Horsehead Nebula,famous celestialdark marking also known as Barnard 33,is notched against a background glow of emission nebulae inthis sharp cosmic skyscape.About five light-years "tall" the Horsehead lies some 1,500 light-years away in the constellation of Orion.Within the region's fertile molecular cloud complex,the expanse of obscuring dust has a recognizable shape onlyby chance fromour perspectivein theMilky Waythough.Orion's easternmost belt star, bright Alnitak,is to the left of center. Energetic ultraviolet light fromAlnitak powers the glow ofdusty NGC 2024, the Flame Nebula, just below it.Completing a study in cosmic contrasts, bluish reflectionnebula NGC 2023 is below the Horsehead itself.This well-framed telescopic field spans about 3 full moons onthe sky.

2022年11月28日:穿过猎户座的狮子流星-（Leonid Meteors Through Orion） [2022年11月28日:穿过猎户座的狮子流星-（Leonid Meteors Through Orion）--原图下载](https://apod.nasa.gov/apod/image/2211/Leonids2022_Hongyang_2880.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2211/Leonids2022_Hongyang_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2211/Leonids2022_Hongyang_960.jpg';){mtitle title="穿过猎户座的狮子流星"/}Image Credit & Copyright: Luo Hongyang说明: 下一颗流星会出现在何处？纵然在流星雨期间，这也几乎是难以预知。因此，要观赏流星雨的好方法，就是找一个能舒适的坐下并监控大片幽暗天空的地点。尤其是能与朋友共享这种体验，会令人更加满足。这幅影像所呈现的流星雨，是在本月稍早达到极大期的2022年狮子流星雨，观测点从中国．海南省俯瞰南中国海。而影像则是由数小时期间所捕获并隔离出来的流星痕，与及稍早拍摄的前景影像叠加而成。在此时及此地，可以看到可回溯到狮子座的狮子流星，滑过了猎户座和其他星座。影像中，还可见到明亮泛红的火星出现在影像顶部附近。影像中的这二位流星爱好者，因为对天文学的热爱而结识、结縭，并在本月欢庆他们共同的生日。{lamp/}原文：{mtitle title="Leonid Meteors Through Orion"/}Image Credit & Copyright: Luo HongyangExplanation: Where will the next meteor appear?Even during a meteor shower, it is practically impossible to know.Therefore, a good way to enjoy a meteor shower is to find a place where you can sit comfortably and monitor a great expanse of dark sky.And it may be satisfying to share this experience with a friend. The meteor shower depicted was the 2022 Leonids which peaked earlier this month, and the view is from Hainan, China looking out over the South China Sea.Meteor streaks captured over a few hours were isolated and added to a foreground image recorded earlier. From this place and time, Leonid meteors that trace back to the constellation of Leo were seen streaking across other constellations including Orion.The bright red planet Mars appears near the top of the image.Bonding over their love of astronomy, the two pictured meteor enthusiasts, shown celebrating their common birthday this month, are now married.