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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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2023-11-08
2023年11月08日:欧几里得太空望远镜的英仙星系团-(Perseus Galaxy Cluster from Euclid)
2023年11月08日:欧几里得太空望远镜的英仙星系团-(Perseus Galaxy Cluster from Euclid)--原图下载{mtitle title="欧几里得太空望远镜的英仙星系团"/}Image Credit & License: ESA, Euclid, Euclid Consortium, NASA;Processing: Jean-Charles Cuillandre (CEA Paris-Saclay) & Giovanni Anselmi;Text: Jean-Charles Cuillandre说明: 天空新增了一部名为欧几里得(Euclid)的太空望远镜。欧几里得配备了两部大型的全景相机,用以捕捉从可见光到近红外光的讯息。拥有直径1.2米主镜的欧几里得望远镜,通过锐利的光学系统进行5个小时的持续观测,才拍下了这幅呈现2.5亿光年外英仙星系团里的1,000多个星系之影像。此外,这张影像还记录了10多万个背景星系,有些甚至远在100亿光年之外。欧几里得望远镜的创新性,在于它超过2倍满月面积的宽视场、其6.2亿像素相机所带来的高角度解析率、以及它的红外光视力,更难得的是能同时取得影像和光谱资讯。欧几里得望远镜初步计划要勘测3分之1的天空,并记录超过20亿个星系,以进行暗物质和暗能量是如何塑造我们宇宙的研究。{lamp/}原文:{mtitle title="Perseus Galaxy Cluster from Euclid"/}Image Credit & License: ESA, Euclid, Euclid Consortium, NASA;Processing: Jean-Charles Cuillandre (CEA Paris-Saclay) & Giovanni Anselmi;Text: Jean-Charles CuillandreExplanation: There's a new space telescope in the sky: Euclid.Equipped with two large panoramic cameras, Euclid captures light from the visible to the near-infrared. It took five hours of observing for Euclid's 1.2-meter diameter primary mirror to capture, through its sharp optics, the 1000+ galaxies in the Perseus cluster, which lies 250 million light years away. More than 100,000 galaxies are visible in the background, some as far away as 10 billion light years.The revolutionary nature of Euclid lies in the combination of its widefield of view (twice the area of the full moon), its high angular resolution(thanks to its 620 Megapixel camera), and its infrared vision, which captures both images and spectra. Euclid's initial surveys, covering a third of the sky and recording over 2 billion galaxies, will enable a study of how dark matter and dark energy have shaped our universe.
2023年11月08日
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2023-10-10
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10月10日
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2023-08-13
2023年08月13日:红外光波段的草帽星系-(The Sombrero Galaxy in Infrared)
2023年08月13日:红外光波段的草帽星系-(The Sombrero Galaxy in Infrared)--原图下载{mtitle title="红外光波段的草帽星系"/}Credit: R. Kennicutt (Steward Obs.) et al.,SSC,JPL,Caltech,NASA说明: 这个飘浮的环之大小和星系相当。更具体的说,它就是草帽星系,或至少是草帽星系的一部分。很上相的草帽星系,则是我们附近的室女座星系团里最大的星系之一。而在可见光所见、环绕在草帽星系腰部的黝黑尘埃带,于红外光波段变得格外的明亮。这幅经过数位增锐的主题影像,整合了来自史匹哲太空望远镜所记录、并以假色呈现的红外光数据,以及美国航太总署.哈伯太空望远镜先前所拍摄的可见光照片。草帽星系又名为M104,离我们约有2千8百万光年远,大小约为5万光年。用小望远镜就能在北天的室女座方向见到M104。 (Sombrero Galaxy 墨西哥帽星系、草帽星系或宽边帽星系){lamp/}原文:{mtitle title="The Sombrero Galaxy in Infrared"/}Credit: R. Kennicutt (Steward Obs.) et al.,SSC,JPL,Caltech,NASAExplanation: This floating ring is the size of a galaxy. In fact, it is a galaxy -- or at least part of one: the photogenicSombrero Galaxy,one of the largest galaxies in the nearbyVirgo Cluster of Galaxies. The dark band ofdust that obscures the mid-section of theSombrero Galaxy in optical light actuallyglows brightly in infrared light. The featured image, digitally sharpened, shows theinfraredglow, recently recorded by the orbitingSpitzer Space Telescope, superposed in false-color on anexisting image taken byNASA's Hubble Space Telescope in visible light.The SombreroGalaxy, also known asM104, spans about 50,000 light years across and lies 28 million light years away. M104can be seen with a small telescope in the direction of theconstellation Virgo.
2023年08月13日
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2022-12-06
2022年12月06日:韦伯:M16的恆星形成之柱-(M16: A Star Forming Pillar from Webb)
2022年12月06日:韦伯:M16的恆星形成之柱-(M16: A Star Forming Pillar from Webb)--原图下载{mtitle title="韦伯:M16的恆星形成之柱"/}Image Credit: NASA,ESA,CSA,STScI, Processing & Copyright: Mehmet Hakan Özsaraç说明: 这座星际山峰之内发生了什么事?恒星正形成于其中。这座宇宙山峰,其实是美丽的老鹰星云(M16)里的气体与尘埃柱。这种云柱的密度很低,你可轻易的穿过它,而它之所以看起来形似坚柱,是因为它含有大量的尘埃,而且极厚。云柱里的亮区是受到内部新诞生的恒星之照耀。这些亮区看似只发出明亮的红光及红外光,则是因为蓝光都被居间的星际尘埃给散射了。这幅呈现云柱前所未见细微结构的主题影像,是由去年底发射的韦伯太空望远镜(JWST)不久前在近红外波段拍摄的。这些年轻恒星发出的高能星光、侵蚀性的恒星风、以及最后死亡时的超新星爆炸,会在接下来的100,000年里慢慢摧毁这根恒星诞生之柱。{lamp/}原文:{mtitle title="M16: A Star Forming Pillar from Webb"/}Image Credit: NASA,ESA,CSA,STScI, Processing & Copyright: Mehmet Hakan ÖzsaraçExplanation: What’s happening inside this interstellar mountain?Stars are forming.The mountain is actually a column of gas and dust in the picturesque Eagle Nebula (M16). A pillar like this is so low in density that you could easily fly though it -- it only appears solid because of its high dust content and great depth.The glowing areas are lit internally by newly formed stars.These areas shine in red and infrared light because blue light is scattered away by intervening interstellar dust.The featured image was captured recently in near-infrared light in unprecedented detail by the James Webb Space Telescope (JWST), launched late last year.Energetic light, abrasive winds, and final supernovas from these young stars will slowly destroy this stellar birth column over the next 100,000 years.
2022年12月06日
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2022-08-30
2022年08月30日:韦伯太空望远镜的木星影像-(Jupiter from the Webb Space Telescope)
[2022年08月30日:韦伯太空望远镜的木星影像-(Jupiter from the Webb Space Telescope)--原图下载](https://apod.nasa.gov/apod/image/2208/Jupiter2_WebbSchmidt_3283_annotated.png"onMouseOver="if (document.images)document.imagename1.src='image/2208/Jupiter2_WebbSchmidt_1080.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2208/Jupiter2_WebbSchmidt_1080_annotated.jpg';){mtitle title="韦伯太空望远镜的木星影像"/}Image Credit: NASA, ESA, CSA,Jupiter ERS Team; Processing: Ricardo Hueso (UPV/EHU) & Judy Schmidt说明: 这幅木星的新影像很有启发性。具体来说,这幅韦伯太空望远镜 所拍摄的高解析率木星红外光影像,揭示了明亮高层云(包括大红斑)和暗色低层云之间前所不知的差异。此外,在这幅韦伯望远镜影像里,还可见到木星的尘埃环、两极的明亮极光、以及木星的卫星 木卫五和木卫十五。在南极光里,亦可见到由火山活动剧烈的木卫一,以磁场把带电粒子磁引导到木星上所造成亮斑。影像中有部分天体是如此的明亮,以至于它们的光在韦伯的光学系统周围产生明显的衍射,从而产生带纹。主镜直径超过6 米的韦伯望远镜,在地球附近绕太阳运行<a/>,它是迄今为止发射的最大型天文望远镜,集光面积为哈伯望远镜的6倍以上。{lamp/}原文:{mtitle title="Jupiter from the Webb Space Telescope"/}Image Credit: NASA, ESA, CSA,Jupiter ERS Team; Processing: Ricardo Hueso (UPV/EHU) & Judy SchmidtExplanation: This new view of Jupiter is illuminating.High-resolution infrared images of Jupiter from the new James Webb Space Telescope (Webb) reveal, for example, previously unknown differences between high-floating bright clouds -- including the Great Red Spot -- and low-lying dark clouds.Also clearly visible in the featured Webb image are Jupiter's dust ring, bright auroras at the poles, and Jupiter's moons Amalthea and Adrastea.Large volcanic moon Io's magnetic funneling of charged particles onto Jupiter is also visible in the southern aurora.Some objects are so bright that light noticeably diffracts around Webb's optics creating streaks. Webb, which orbits the Sun<a/> near the Earth, has a mirror over six meters across making it the largest astronomical telescope ever launched -- with over six times more light-collecting area than Hubble.
2022年08月30日
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2022-01-17
2022年01月17日:堰蜓座的暗星云-(Chamaeleon Dark Nebulas)
[2022年01月17日:堰蜓座的暗星云-(Chamaeleon Dark Nebulas)--原图下载](https://apod.nasa.gov/apod/image/2201/DarkNebulaVd_HmoRuuth_4096.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2201/DarkNebulaVd_HmoRuuth_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2201/DarkNebulaVd_HmoRuuth_960.jpg';){mtitle title="堰蜓座的暗星云"/}Image Credit & Copyright: Jarmo Ruuth, Telescope Live, Heaven's Mirror Observatory说明: 有时候,位在星际空间有稜有角的暗星云也可以很优美。例证之一为南天极区的堰蜓座。极为昏暗通常不得见的黝黑尘埃,很擅长遮挡来自后方的恒星和星系之可见光。不过在幅4小时长曝光影像里,这些尘埃所反射的是自身发出的光,而其强烈的红光和近红外光辐射,让它带着深棕的色泽。影像中右方对比鲜明泛蓝亮区,源自亮星小斗一周围的尘埃,偏好的反射这颗蓝白恒星所发出的蓝光所致。视野里的恒星和尘埃,几乎都在我们的银河系之内,较突出的例外是造成小斗一下方的泛白亮点、位在后方远处的星系IC 3104。星际尘埃大多形成于巨星的低温大气里,然后在星光、恒星风、和诸如超新星这类恒星爆炸的推送下,散布到宇宙空间里。(Chamaeleon 堰蜓座;Beta Chamaeleontis 小斗一){lamp/}原文:{mtitle title="Chamaeleon Dark Nebulas"/}Image Credit & Copyright: Jarmo Ruuth, Telescope Live, Heaven's Mirror ObservatoryExplanation: Sometimes the dark dust of interstellar space has an angular elegance. Such is the case toward the far-south constellation of Chamaeleon.Normally too faint to see, dark dust is best known for blocking visible light from stars and galaxies behind it.In this four-hour exposure, however, the dust is seen mostly in light of its own, with its strong red and near-infrared colors giving creating a brown hue.Contrastingly blue, the bright star Beta Chamaeleontis is visible just to the right of center, with the dust that surrounds it preferentially reflecting blue light from its primarily blue-white color. All of the pictured stars and dust occur in our own Milky Way Galaxy with -- but one notable exception: the white spot just below Beta Chamaeleontis is the galaxy IC 3104 which lies far in the distance. Interstellar dust is mostly created in the cool atmospheres of giant stars and dispersed into space by stellar light, stellar winds, and stellar explosions such as supernovas.
2022年01月17日
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