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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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2023-07-10
2023年07月10日:NGC 6559的恆星、尘埃、与星云-(Stars, Dust and Nebula in NGC 6559)
2023年07月10日:NGC 6559的恆星、尘埃、与星云-(Stars, Dust and Nebula in NGC 6559)--原图下载{mtitle title="NGC 6559的恆星、尘埃、与星云"/}Image Credit & Copyright: Adam Block,Telescope Live说明: 当恒星形成时,喧嚣混乱主宰一切。恒星形成区NGC 6559就是这样的教科书範例之一。在这幅主题影像里,可见到泛红的氢 发射星云、泛蓝的尘埃 反射星云、满是尘埃的暗吸收星云、以及它们所诞生的恒星。而从緻密气体里诞生的第一批大质量恒星,将会发出高能星光和恒星风,侵蚀、碎裂和雕塑诞生它们的育婴室。接着,它们爆发生了爆炸,所产生的大混乱可以是既美丽又複杂。在数千万年后,其内的尘埃被蒸发掉,气体也被吹走,徒留下一个空泛的疏散星团。{lamp/}原文:{mtitle title="Stars, Dust and Nebula in NGC 6559"/}Image Credit & Copyright: Adam Block,Telescope LiveExplanation: When stars form, pandemonium reigns. A textbook case is the star forming regionNGC 6559. Visible in the featured image are red glowingemission nebulas ofhydrogen, bluereflection nebulas ofdust, darkabsorption nebulas of dust, and the stars that formed from them. The first massive starsformed from the dense gas will emitenergetic light andwindsthat erode, fragment, andsculpt their birthplace. And then theyexplode.The resulting morasscan be as beautiful as it is complex. After tens of millions of years, the dust boils away,the gas gets swept away, and all that is left is a bareopen cluster of stars.
2023年07月10日
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2022-09-13
2022年09月13日:太阳表面的长蛇状暗条-(A Long Snaking Filament on the Sun)
2022年09月13日:太阳表面的长蛇状暗条-(A Long Snaking Filament on the Sun)--原图下载{mtitle title="太阳表面的长蛇状暗条"/}Image Credit & Copyright: Alan Friedman(Averted Imagination)说明: 在这个月初,太阳出现了有记录以来最长的暗条(filament)之一。如上面这幅影像所示,影像中心周围有一道弯曲的亮纹,而这道宛如长蛇的暗条,绵延了将近350,000公里,约莫是太阳半径之半。暗条是被太阳磁场抬昇腾空的炽热气体,因此从侧面观看,它是突起于太阳表面的日珥 。在这幅影像里,太阳的临边还可见到另一个较小的日珥。这幅明暗反转的假色主题影像,不仅突显了暗条,也呈现了太阳宛如地毯的色球层。影像右上角的亮斑,其实上是一个大小与地球相近的太阳黑子。太阳暗条通常可存在数小时到数天,最终会坍塌把炽热的电浆释回太阳。不过,有时它们会发生爆发并把粒子射入太阳系里,其中有些甚至会触发地球上的极光。这幅影像里的暗条出现在9月初,并稳定悬浮了约一星期之久。{lamp/}原文:{mtitle title="A Long Snaking Filament on the Sun"/}Image Credit & Copyright: Alan Friedman(Averted Imagination)Explanation: Earlier this month, the Sun exhibited one of the longer filaments on record. Visible as the bright curving streak around the image center, the snaking filament's full extent was estimated to be overhalf of the Sun's radius -- more than 350,000 kilometers long.A filament is composed of hot gas held aloft by the Sun's magnetic field, so that viewed from the side it would appear as a raised prominence. A different, smaller prominence is simultaneously visible at the Sun's edge.The featured image is in false-color and color-inverted to highlight not only the filament but the Sun's carpet chromosphere. The bright dot on the upper right is actually a dark sunspot about the size of the Earth. Solarfilaments typically last from hours to days, eventually collapsing to return hot plasma back to the Sun.Sometimes, though, they explode and expel particles into the Solar System, some of which trigger auroras on Earth.The pictured filament appeared in early September and continued to hold steady for about a week.
2022年09月13日
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2021-04-14
2021年04月14日:铅笔星云与超新星爆震波-(The Pencil Nebula Supernova Shock Wave)
2021年04月14日:铅笔星云与超新星爆震波-(The Pencil Nebula Supernova Shock Wave)--原图下载{mtitle title="铅笔星云与超新星爆震波"/}Image Credit & Copyright: Greg Turgeon & Utkarsh Mishra说明: 这道超新星爆震波,以每小时超过500,000公里的速度犁过星际空间。在这幅美丽细緻的彩色组合影像的中心附近,向上移动的纤细明亮辫状波纹,其实是几乎侧向的层状宇宙辉光云气上的涟漪。这团编录号为NGC 2736的星云,因为拥有细长的外貌而获得铅笔星云的雅号。离我们约800光年远的铅笔星云,长约5光年左右,是船帆座超新星遗迹的一小部份。船帆座超新星遗迹本身的直径则在100光年左右,是人类在11,000年前见到的恒星爆炸,所留下的扩张恒星碎片云。最起初,爆震波的速度高达每小时数百万公里,但随着它扫集周遭的星际云气,速度已大幅降低。在这幅窄波段广角影像里,红及蓝色泽分别标示来自电离氢原子和氧原子的特徵辐射。{lamp/}原文:{mtitle title="The Pencil Nebula Supernova Shock Wave"/}Image Credit & Copyright: Greg Turgeon & Utkarsh MishraExplanation: This supernova shock wave plows through interstellar space at over 500,000 kilometers per hour.Near the middle and moving up in this sharply detailed color composite, thin, bright, braided filaments are actually long ripples in a cosmic sheet of glowing gasseen almost edge-on.Cataloged as NGC 2736, its elongated appearance suggests its popular name,the Pencil Nebula.The Pencil Nebula is about 5 light-years long and 800 light-years away, but represents only a small part of theVela supernova remnant.The Vela remnant itselfis around 100 light-years in diameter, the expandingdebriscloud of a star that was seen to explode about 11,000 years ago.Initially, the shock wave was moving at millions of kilometersper hour but has slowed considerably, sweeping upsurrounding interstellar material.In the featured narrow-band, wide field image, red and blue colors track, primarily, the characteristic glows ofionized hydrogen andoxygen atoms, respectively.
2021年04月14日
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2018-05-23
2018年05月23日:碰撞中的螺旋星系NGC 4038-(Spiral Galaxy NGC 4038 in Collision)
2018年05月23日:碰撞中的螺旋星系NGC 4038-(Spiral Galaxy NGC 4038 in Collision)--原图下载{mtitle title="碰撞中的螺旋星系NGC 4038"/}Image Credit: NASA, ESA, Hubble, HLA;Processing & Copyright: Domingo Pestana说明: 这个星系在过去的1千年之中,日子并不好过。事实上,在过去的1亿年中,它的日子一直过得不怎么样,而在接下来的10亿年之中,日子会更加动荡。影像右下角的NGC 4038,曾经是一个正常的螺旋星系,过着自己的小日子,直到位在它左上方的星系NGC 4039撞了过来,然后,就产生了上面主题影像中,这个目前仍在演化,名为触鬚星系的着名残骸。随着重力让个别星系的结构重整,成团的云气发生互撞,于是,泛蓝成团的明亮恒星形成,大质量恒星诞生和爆炸,把棕色的丝缕状尘埃喷得到处。最终,这二个星系将合併成一个较大的螺旋星系。这类的星系碰撞并不罕见,就连我们的银河系过去也经历数次碰撞,而在接下来的数十亿年内,预料将会和邻近的仙女座大星系撞成一团。组成这幅影像的照片,是由轨道上的哈伯太空望远镜所拍摄,而专业天文学家希望透过这种影像,能对星系碰撞有更完整的了解。这幅及其他许多的哈伯望远镜深空影像,都已公开发布,让有兴趣的业余人士下载,进一步处理成诸如上面这种具有视觉震撼性的组合影像。{lamp/}原文:{mtitle title="Spiral Galaxy NGC 4038 in Collision"/}Image Credit: NASA, ESA, Hubble, HLA;Processing & Copyright: Domingo PestanaExplanation: This galaxy is having a bad millennium. In fact, the past 100 million years haven't been so good, and probably the next billion or so will be quite tumultuous. Visible toward the lower right, NGC 4038 used to be a normal spiral galaxy, minding its own business, until NGC 4039, to its upper left, crashed into it. The evolving wreckage, known famously as the Antennae, is featured here. As gravity restructures each galaxy, clouds of gas slam into each other, bright blue knots of stars form, massive stars form and explode, and brown filaments of dust are strewn about. Eventually the two galaxies will converge into one larger spiral galaxy.Such collisions are not unusual, and even our own Milky Way Galaxy has undergone several in the past and is predicted to collide with our neighboring Andromeda Galaxy in a few billion years.The frames that compose this image were taken by the orbiting Hubble Space Telescope by professional astronomers to better understand galaxy collisions.These frames -- and many other deep space images from Hubble -- have since been made public, allowing interested amateurs to download and process them into, for example, this visually stunning composite.
2018年05月23日
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2017-09-25
2017年09月25日: 抛出气壳的大质量恆星G79.29+0.46-(Massive Shell-Expelling Star G79.29+0.46)
2017年09月25日: 抛出气壳的大质量恆星G79.29+0.46-(Massive Shell-Expelling Star G79.29+0.46)--原图下载{mtitle title=" 抛出气壳的大质量恆星G79.29+0.46"/}Image Credit: NASA, Spitzer Space Telescope, WISE; Processing & License : Judy Schmidt说明: 这么不稳定的恒星真的很少见。位在影像中右上方尘埃内的大质量恒星G79.29+0.46,,是我们银河系目前所知不到一百颗的高光度蓝变星(LBVs)之一。高光度蓝变星会抛出外层气壳,每百年甚至可以失去一个木星的质量。这颗星其实是明亮的蓝色恒星,然而受到尘埃的包围,在可见光波段不得见。在上面这幅结合美国航太总署史匹哲太空望远镜和广域红外巡天探测卫星数据的色泽映射影像里,这颗渲染成绿色的垂死恒星,周围环绕着红色的壳层结构。恒星G79.29+0.46位在我们银河系的恒星形成区天鹅座X区内。不过,为何G79.29+0.46会如此不稳定、它能在高光度蓝变星阶段停留多久、与它何时会发生超新星爆炸,目前全都是未知。{lamp/}原文:{mtitle title="Massive Shell-Expelling Star G79.29+0.46"/}Image Credit: NASA, Spitzer Space Telescope, WISE; Processing & License : Judy SchmidtExplanation: Stars this volatile are quite rare. Captured in the midst of dust clouds and visible to the right and above center is massive G79.29+0.46, one of less than 100 luminous blue variable stars (LBVs) currently known in our Galaxy. LBVs expel shells of gas and may lose even the mass of Jupiter over 100 years. The star, itself bright and blue, is shrouded in dust and so not seen in visible light.The dying star appears green and surrounded by red shells, though, in this mapped-color infrared picture combining images from NASA's Spitzer Space Observatory and NASA's Wide-Field Infrared Survey Explorer. G79.29+0.46 is located in the star-forming Cygnus X region of our Galaxy.Why G79.29+0.46 is so volatile, how long it will remain in the LBV phase, and when it will explode in a supernova is not known.
2017年09月25日
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2013-10-01
2013年10月01日:船帆座超新星遗骸的云气丝-(Filaments of the Vela Supernova Remnant)
2013年10月01日:船帆座超新星遗骸的云气丝-(Filaments of the Vela Supernova Remnant)--原图下载{mtitle title="船帆座超新星遗骸的云气丝"/}Image Credit & Copyright: Angus Lau, Y Van, SS Tong (Jade Scope Observatory)说明: 爆炸已结束,但其影响仍持续着。约在1万1千年前,在人类刚开始记载历史之时,船帆座有一颗星发生爆炸,在天空中形成一个短暂可见的奇异光点。 这颗星的外层冲撞星际物质,所产生的冲击波至今仍然可见;尤其在在X光波段,可清楚见到这道几乎是球状的扩张冲击波。上面这张照片,在可见光波段捕捉到部份的庞大冲击波和云气丝。当气体从爆炸的恒星飞离时,它会发生衰变并和星际物质发生反应,产生各种颜色和波段的光。在船帆座超新星遗骸的中心有颗脉冲星,它是一颗緻密度如同核物质的天体,而且每一秒自转十次以上。{lamp/}原文:{mtitle title="Filaments of the Vela Supernova Remnant"/}Image Credit & Copyright: Angus Lau, Y Van, SS Tong (Jade Scope Observatory)Explanation: The explosion is over but the consequences continue. About eleven thousand years ago a star in the constellation of Vela could be seen to explode, creating a strange point of light briefly visible to humans living near the beginning of recorded history. The outer layers of the star crashed into the interstellar medium, driving a shock wave that is still visible today. A roughly spherical, expanding shock wave is visible in X-rays.The above image captures some of that filamentary and gigantic shock in visible light.As gas flies away from the detonated star, it decays and reacts with the interstellar medium, producing light in many different colors and energy bands.Remaining at the center of the Vela Supernova Remnant is a pulsar, a star as dense as nuclear matter that rotates completely around more than ten times in a single second.
2013年10月01日
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