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2021年09月08日:仙女大星系方向的深空影像-(The Deep Sky Toward Andromeda)
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欢迎来到人生天地间
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2017年11月29日:M42:猎户座大星云-(M42: The Great Orion Nebula)
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2017年08月06日:银河与炸裂的流星-(Milky Way and Exploding Meteor)
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2024年02月11日:直指月亮的火箭烟尘影子-(Rocket Plume Shadow Points to the Moon)
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2023-08-07
2023年08月07日:鹈鹕星云的云气、尘埃与恆星-(The Pelican Nebula in Gas, Dust, and Stars)
2023年08月07日:鹈鹕星云的云气、尘埃与恆星-(The Pelican Nebula in Gas, Dust, and Stars)--原图下载{mtitle title="鹈鹕星云的云气、尘埃与恆星"/}Credit & Copyright: Abe Jones说明: 鹈鹕星云正慢慢变形之中。此星云正式的编录号为IC 5070,它和较大的北美洲星云,以一个满是黝黑尘埃的分子云相隔。因为鹈鹕星云是个特别活耀的恒星形成区和演化中气体云之混合体,故常成为天文研究的焦点。这张主题照片是一幅三色合成影像,分别记录了来自硫、氢与氧的光,以促进我们对恒星诞生区和星云之间交互作用的了解。来自年轻亮星的星光,正缓缓把冰冷的云气转变成炽热的气体,而两者之间称为电离前沿的分界,可见诸影像右侧的明亮橙红区域。然而,在此区域内仍有一些特别緻密的触鬚状冰冷云气残存下来。在数百万年之后,随着恒星与云气的平衡及位置改变,此星云的外观一定会截然不同,届时它可能不再是鹈鹕星云。{lamp/}原文:{mtitle title="The Pelican Nebula in Gas, Dust, and Stars"/}Credit & Copyright: Abe JonesExplanation: The Pelican Nebula is slowly being transformed. IC 5070 (the official designation) is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The Pelican, however, receives much study because it is a particularly active mix of star formation and evolving gas clouds. The featured picture was produced in three specific colors -- light emitted by sulfur, hydrogen, and oxygen -- that can help us to better understand these interactions. The light from young energetic stars is slowly transforming the cold gas to hot gas, with the advancing boundary between the two, known as an ionization front, visible in bright orange on the right.Particularly dense tentacles of cold gas remain. Millions of years from now, the Pelican nebula, bounded by dark nebula LDN 935, might no longer be known as the Pelican, as the balance and placement of stars and gas will surely leave something that appears completely different.
2023年08月07日
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2022-09-08
2022年09月08日:北美洲星云与鹈鹕星云-(North America and the Pelican)
2022年09月08日:北美洲星云与鹈鹕星云-(North America and the Pelican)--原图下载{mtitle title="北美洲星云与鹈鹕星云"/}Image Credit &Copyright: Frank Sackenheim说明: 美丽地球的粉丝,可能不难认出这些宇宙云的轮廓。在影像左方,边缘镶着黝黑不透光尘埃带的明亮辐射区,看似有大陆块的外观,因此这团编录号为NGC 7000的发射星云,拥有北美洲星云的暱称。近在北美洲星云右方的东岸外头,可见到IC 5070,其轮廓则为它博得鹈鹕星云的称号。这二个距离约1,500光年的明亮星云,同是一个庞大、几乎和猎户大星云一样邻近的恒星形成区複合体之一部分。以此个距离来换算,这张3度跨幅的广角影像,宽度大约有80光年。这张精心规划的宇宙影像,组合了数幅窄波段影像数据,以突显明亮的电离前沿和原子氢及氧气发出的特徵辐射。在夜空巡礼天鹅座时,用双筒望远镜即可在天鹅座亮星天津四的东北方看到这些星云。{lamp/}原文:{mtitle title="North America and the Pelican"/}Image Credit &Copyright: Frank SackenheimExplanation: Fans of our fair planetmight recognize the outlines of thesecosmicclouds.On the left, bright emission outlined by dark, obscuring dust lanesseems to trace a continental shape, lending the popular nameNorth America Nebulato the emission region cataloged as NGC 7000.To the right, just off the North America Nebula's east coast,is IC 5070, whose avianprofile suggeststhePelican Nebula. The two bright nebulae are about 1,500 light-years away,part of the samelarge and complexstar forming region, almost as nearby as thebetter-known Orion Nebula.At that distance, the 3 degree wide field of view would span80 light-years.This careful cosmic portraituses narrowband images combined to highlight the brightionization frontsand the characteristic glow from atomic hydrogen, and oxygengas.These nebulae can be seen with binoculars from a dark location. Look northeast of bright starDeneb in Cygnus the Swan, soaring high in the northern summernight sky.
2022年09月08日
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2021-09-16
2021年09月16日:北美洲与鹈鹕-(North America and the Pelican)
2021年09月16日:北美洲与鹈鹕-(North America and the Pelican)--原图下载{mtitle title="北美洲与鹈鹕"/}Image Credit &Copyright:Andrew Klinger说明: 美丽地球的粉丝,可能不难认出这些宇宙云的轮廓。在影像左方,边缘镶着黝黑不透光尘埃带的明亮辐射区,看似有地球大陆的外观,因此这团编录号为NGC 7000的发射星云,拥有北美洲星云的暱称。近在北美洲星云右方的东岸外头,可见到IC 5070,其外观则为它博得鹈鹕星云的称号。这二个约1,500光年远的明亮星云,是一个庞大、几乎和猎户座大星云一样邻近的恒星形成区複合体的一部分。以这个距离来换算,这张3度跨幅的广角影像,宽约有150光年。这张精心规划的宇宙影像,组合了数张窄波段影像照片,以突显明亮的电离前沿和原子氢、硫、和氧发出的特徵辐射。在有幽暗天空的地方巡礼天鹅座时,用双筒望远镜即可在亮星天津四的东北方看到这些星云。{lamp/}原文:{mtitle title="North America and the Pelican"/}Image Credit &Copyright:Andrew KlingerExplanation: Fans of our fair planetmight recognize the outlines of thesecosmic clouds.On the left, bright emission outlined by dark, obscuring dust lanesseems to trace a continental shape, lending the popular nameNorth America Nebulato the emission region cataloged as NGC 7000.To the right, just off the North America Nebula's east coast,is IC 5070, whose avianprofile suggeststhePelican Nebula. The two bright nebulae are about 1,500 light-years away,part of the samelarge and complexstar forming region, almost as nearby as thebetter-known Orion Nebula.At that distance, the 3 degree wide field of view would span80 light-years.This careful cosmic portraitusesnarrow bandimages combined to highlight the brightionization frontsand the characteristic glow from atomic hydrogen, sulfur, and oxygen gas.These nebulae can be seen with binoculars from a dark location. Look northeast of bright starDeneb in the constellation Cygnus the Swan.
2021年09月16日
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2020-11-30
2020年11月30日:移除恆星后的天鹅座-(Cygnus Without Stars)
[2020年11月30日:移除恆星后的天鹅座-(Cygnus Without Stars)--原图下载](https://apod.nasa.gov/apod/image/2011/CygnusStarless_Cameron_8859.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2011/CygnusStarless_Cameron_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2011/CygnusStarless_Cameron_960.jpg';){mtitle title="移除恆星后的天鹅座"/}Image Credit & Copyright: Bowen James Cameron说明: 我们的天空到处都是在散发淡淡辉光的气体,不过,需要透过到灵敏的相机和望远镜才得见。举例来说,这幅宽12度的天鹅座北区影像,呈现我们银河系盘面一带的宇宙星云複合体。这幅组合主题影像,是透过二种滤镜所拍摄,包括只透过激态氢原子发出的可见红光之氢α滤镜,以及主要透过少量电离氧辐射的蓝滤镜。因此,在这幅曝光时间为18小时的影像里,泛蓝区比泛红区高温。此外,影像更经过数位处理,移除众多的点状银河系众星。影像里可辨识的明亮星云,有NGC 7000 (北美洲星云)、左侧的IC 5070 (鹈鹕星云)、右侧的IC 1318 (蝴蝶星云)与NGC 6888 (眉月星云),以及其他散布在这幅广角影像各处的星云。{lamp/}原文:{mtitle title="Cygnus Without Stars"/}Image Credit & Copyright: Bowen James CameronExplanation: The sky is filled with faintly glowing gas, though it can take asensitive camera and telescope to see it.For example, this twelve-degree-wide view of thenorthern part of the constellationCygnusreveals a complex array of cosmic clouds of gasalong the plane of our Milky Way galaxy.The featured mosaic of telescopic images was recorded through two filters: an H-alpha filter that transmits only visible red light fromglowing hydrogen atoms,and a blue filter that transmits primarily light emitted by the slightamount of energized oxygen.Therefore, in this 18-hour exposure image, blue areas are hotter than red. Further digital processing has removed the myriad of point-like Milky Way stars from the scene.Recognizable bright nebulas includeNGC 7000 (North America Nebula), andIC 5070 (Pelican Nebula) on the left withIC 1318 (Butterfly Nebula) andNGC 6888 (Crescent Nebula) on the right --but others can be found throughout the wide field.
2020年11月30日
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2019-09-25
2019年09月25日:鹈鹕星云的云气、尘埃与恆星-(The Pelican Nebula in Gas, Dust, and Stars)
2019年09月25日:鹈鹕星云的云气、尘埃与恆星-(The Pelican Nebula in Gas, Dust, and Stars)--原图下载{mtitle title="鹈鹕星云的云气、尘埃与恆星"/}Image Credit & Copyright: Yannick Akar说明: 鹈鹕星云正慢慢变形之中。此星云正式的编录号为IC 5070,它和较大的北美洲星云,以一个满是黝黑尘埃的分子云相隔。因为鹈鹕星云是个特别活耀的恒星形成区和演化中气体云之混合体,故常成为天文研究的焦点。这张主题照片是一幅三色合成影像,记录了分别来自硫、氢与氧的光,以促进我们对恒星诞生区和星云之间交互作用的了解。来自年轻亮星的星光,正缓慢地把冰冷云气转变成炽热的气体,而两者之间称为电离前缘的分界,可见诸影像右侧的明亮橙红区域。然而,在此区域内仍有一些特别緻密的触鬚状冰冷云气残存下来。在数百万年之后,随着恒星与云气的平衡和位置改变,此星云的外观一定会全然不同,届时它可能不再是鹈鹕星云。{lamp/}原文:{mtitle title="The Pelican Nebula in Gas, Dust, and Stars"/}Image Credit & Copyright: Yannick AkarExplanation: The Pelican Nebula is slowly being transformed. IC 5070, the official designation, is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The Pelican, however, receives much study because it is a particularly active mix of star formation and evolving gas clouds. The featured picture was produced in three specific colors -- light emitted by sulfur, hydrogen, and oxygen -- that can help us to better understand these interactions. The light from young energetic stars is slowly transforming the cold gas to hot gas, with the advancing boundary between the two, known as an ionization front, visible in bright orange on the right.Particularly dense tentacles of cold gas remain. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will surely leave something that appears completely different.
2019年09月25日
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2017-12-01
2017年12月01日:北美洲星云与鹈鹕星云-(North America and the Pelican)
2017年12月01日:北美洲星云与鹈鹕星云-(North America and the Pelican)--原图下载{mtitle title="北美洲星云与鹈鹕星云"/}Image Credit &Copyright:Paolo Moroni说明: 美丽地球的拥护者,可能不难认出这些宇宙云的轮廓。在影像左方,边缘镶着黝黑不透光尘埃带的明亮辐射,看似有大陆块的外观,因此这团编录号为NGC 7000的发射星云,拥有北美洲星云的暱称。近在北美洲星云右方的东岸外头,可见到IC 5070,其外观则为它博得鹈鹕星云的称号。这二个距离约1,500光年的明亮星云,同是一个庞大、几乎和猎户座大星云一样邻近的恒星形成区複合体之一部分。在这个距离,这张6度跨幅的广角影像,宽度大约有150光年。这张精心规划的宇宙影像,组合了数幅窄波段影像数据,以突显明亮的电离前沿和原子氢发出的泛红特徵辐射。在幽暗地区巡礼天鹅座时,用双筒望远镜即可在亮星天津四的东北方看到这些星云。{lamp/}原文:{mtitle title="North America and the Pelican"/}Image Credit &Copyright:Paolo MoroniExplanation: Fans of our fair planetmight recognize the outlines of thesecosmic clouds.On the left, bright emission outlined by dark, obscuring dust lanesseems to trace a continental shape,lending the popular nameNorthAmerica Nebula to the emission region cataloged as NGC 7000.To the right, just off the North America Nebula's east coast,is IC 5070, whose profile suggests the PelicanNebula. The two bright nebulae are about 1,500 light-years away,part of the same largeand complex star forming region, almost as nearby as thebetter-known Orion Nebula.At that distance, the 6 degree wide field of view would span150 light-years.This carefulcosmic portrait uses narrow band images to highlight the brightionization fronts and the characteristicred glow from atomic hydrogen gas.Thesenebulae can be seen with binoculars from a dark location. Look northeast of bright starDeneb in the constellation of Cygnus the Swan.
2017年12月01日
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