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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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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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2023-11-26
2023年11月26日:源自彗星67P表面的尘埃喷流-(A Dust Jet from the Surface of Comet 67P)
2023年11月26日:源自彗星67P表面的尘埃喷流-(A Dust Jet from the Surface of Comet 67P)--原图下载{mtitle title="源自彗星67P表面的尘埃喷流"/}Image Credit: ESA, Rosetta, MPS, OSIRIS;UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA说明: 彗星的彗尾来自何处呢?在彗星的彗核上,好像没有会发出喷流形成彗尾的特定位置。不过,在2016年欧洲航天局的罗塞塔号太空船,不但拍摄到一道源自彗星67P/丘泽的喷流,而且还直接穿过它。这幅说服力十足的主题影像,呈现了一道明亮的羽状烟尘,从紧贴着一座10米高墙的圆形凹地喷出。分析罗塞塔号的数据证实,这道喷流的组成是尘埃和水冰。这片崎岖不过很单调的原野显示,产生喷流的源头可能远在多孔的表面之下。这幅影像拍摄的时间点,大约在罗塞塔号进行受控撞击彗星67P表面终结任务的前二个月。{lamp/}原文:{mtitle title="A Dust Jet from the Surface of Comet 67P"/}Image Credit: ESA, Rosetta, MPS, OSIRIS;UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDAExplanation: Where do comet tails come from? There are no obvious places on the nuclei of comets from which the jets that create comet tails emanate. In 2016, though, ESA's Rosetta spacecraft not only imaged a jet emerging from Comet 67P/Churyumov-Gerasimenko, but flew right through it. Featured is a telling picture showing a bright plume emerging from a small circular dip bounded on one side by a 10-meter high wall. Analyses of Rosetta data show that the jet was composed of both dust and water-ice.The rugged but otherwise unremarkable terrain indicates that something likely happened far under the porous surface to create the plume. This image was taken about two months before Rosetta's mission ended with a controlled impact onto Comet 67P's surface.
2023年11月26日
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2023-11-13
2023年11月13日:阿尔卑斯山上空的仙女大星系-(Andromeda over the Alps)
2023年11月13日:阿尔卑斯山上空的仙女大星系-(Andromeda over the Alps)--原图下载{mtitle title="阿尔卑斯山上空的仙女大星系"/}Image Credit & Copyright: Dzmitry Kananovich说明: 你看过仙女大星系吗?虽然在肉眼里,M31只是一团暗淡的弥漫光斑,但你所见的光超过2百万年老,因此它可能是你直接可见的最古老星光。这张主题影像,捕捉到去年初悬在瑞士 阿尔卑斯山上空、即将西落的仙女大星系。纵然能以肉眼观赏银河系的邻居星系是很酷的事,但长曝光的相机照片,更能记录诸多暗淡而动人的细节。这幅影像是由同一部相机连续拍摄的多张前景与背景照片组合而成。近来的数据指出,我们的银河系在未来的数十亿年之中,将和较大的仙女大星系互撞及合併。{lamp/}原文:{mtitle title="Andromeda over the Alps"/}Image Credit & Copyright: Dzmitry KananovichExplanation: Have you ever seen the Andromeda galaxy?Although M31 appears as a faint and fuzzy blob to the unaided eye, the light you see will be over two million years old, making it likely the oldest light you ever will see directly.The featured image captured Andromeda just before it set behind the Swiss Alps early last year.As cool as it may be to see this neighboring galaxy to our Milky Way with your own eyes, long duration camera exposures can pick up many faint and breathtaking details.The image is composite of foreground and background images taken consecutively with the same camera and from the same location. Recent data indicate that our Milky Way Galaxy will collide and coalesce with Andromeda galaxy in a few billion years.
2023年11月13日
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2023-09-10
2023年09月10日:美国新墨西哥州上空的日环食-(An Annular Solar Eclipse over New Mexico)
2023年09月10日:美国新墨西哥州上空的日环食-(An Annular Solar Eclipse over New Mexico)--原图下载{mtitle title="美国新墨西哥州上空的日环食"/}Credit & Copyright: Colleen Pinski说明: 这家伙在做什么?2012年日环食的可见区域,为穿过北太平洋和美国本土数个西部州的狭窄全食带。在日环食期间,月亮离地球太远而无法完全遮住太阳,因此日盘会从月盘的边缘露出来,形成火之环的景观。为了要记录这种难得的太阳事件,一位不嫌麻烦的的摄影者,从亚利桑那州开车到新墨西哥州,寻找完美的观测地点。在架好设备后,食日正落向半公里外的山脊后方,而一位不知情者刚好走入视野。虽然虽然摄影者为外加的人文元素而心怀感激,但他从未得知这位以剪影之姿入镜者的身份。乍看之下,这位老兄好像手持一个用来观赏这次日食的圆形器物。这幅影像是在2012年5月20日当地时间7:36 pm,摄于美国.新墨西哥州.阿布奎基市的一座公园内。下个月的10月14日将再出现另一例日环食,而如果天空清朗的话,此事件可见的区域为穿过北美洲与南美洲的狭窄食带。在此同时,这二个洲无云遮蔽地区的其他住民可见到日偏食。{lamp/}原文:{mtitle title="An Annular Solar Eclipse over New Mexico"/}Credit & Copyright: Colleen PinskiExplanation: What is this person doing? In 2012, an annular eclipse of the Sun was visible over a narrow path that crossed the northern Pacific Ocean and several western US states. In an annular solar eclipse, the Moon is too far from the Earth to block out the entire Sun, leaving the Sun peeking out over the Moon's disk in a ring of fire. To capture this unusual solar event, an industrious photographer drove from Arizona to New Mexico to find just the right vista.After setting up and just as the eclipsed Sun was setting over a ridge about 0.5 kilometers away, a person unknowingly walked right into the shot.Although grateful for the unexpected human element, the photographer never learned the identity of the silhouetted interloper.It appears likely that the person is holding a circular device that would enable them to get their own view of the eclipse.The shot was taken at sunset on 2012 May 20 at 7:36 pm local time from a park near Albuquerque. Next month, on October 14, a different narrow swath across North and South America will be exposed to a different annular solar eclipse, if the sky is clear.Simultaneously, cloud-free observers almost anywhere on either continent will be able to see a partial solar eclipse.
2023年09月10日
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2023-07-24
2023年07月24日:流星解体时的元素发光-(Chemicals Glow as a Meteor Disintegrates)
2023年07月24日:流星解体时的元素发光-(Chemicals Glow as a Meteor Disintegrates)--原图下载{mtitle title="流星解体时的元素发光"/}Image Credit & Copyright: Michael Kleinburger说明: 流星的色彩可以很缤纷。虽然人类的眼睛无法分办太多色彩,但相机通常可以。这幅影像里的火流星,据摄影者之言,不但是他此生所见最明亮的流星,而其色彩更是无比缤纷。于今年7月中旬,在奥地利.霍赫卡山设定相机要拍摄我们银河系的中央盘面时,摄影者意外捕捉到这颗流星。这颗发光的小碎片,可能是很久之前碎裂自彗星或小流星,然后不幸闯入了地球的大气层。流星的色彩通常来自流星解体时所释放的电离元素,蓝绿色泽的光通常来自镁、紫光来自钙、而绿光源自镍。不过,红光则通常是由地球大气中的激发态氮和氧所发出的。这颗转瞬即逝的火 流星持续不到1秒,然而它在风中飘飞的电离流星痕,可见的期间绵延了将近1分钟。{lamp/}原文:{mtitle title="Chemicals Glow as a Meteor Disintegrates"/}Image Credit & Copyright: Michael KleinburgerExplanation: Meteors can be colorful.While the human eye usually cannot discern many colors, cameras often can.Pictured here is a fireball, a disintegrating meteor that was not only one of the brightest the photographer has ever seen, but colorful.The meteor was captured by chance in mid-July with a camera set up on Hochkar Mountain in Austria to photograph the central band of our Milky Way galaxy.The radiant grit, likely cast off by a comet or asteroid long ago, had the misfortune to enter Earth's atmosphere. Colors in meteors usually originate from ionized chemical elements released as the meteor disintegrates, with blue-green typically originating from magnesium, calcium radiating violet, and nickel glowing green.Red, however, typically originates from energized nitrogen and oxygen in the Earth's atmosphere. This bright meteoric fireball was gone in a flash -- less than a second -- but it left a wind-blown ionization trail that remained visible for almost a minute.
2023年07月24日
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2023-07-14
2023年07月14日:近日点附近的彗星C/2023 E1 ATLAS-(Comet C/2023 E1 ATLAS near Perihelion)
2023年07月14日:近日点附近的彗星C/2023 E1 ATLAS-(Comet C/2023 E1 ATLAS near Perihelion)--原图下载{mtitle title="近日点附近的彗星C/2023 E1 ATLAS"/}Image Credit &Copyright:Dan Bartlett说明: 刚在今年3月发现的彗星C/2023 E1(ATLAS),是由美国航太总署资助的小行星撞击最后警报系统(ATLAS)所发现的另一颗彗星。在7月1日,这颗ATLAS彗星来到最接近太阳的近日点。而在摄于通过近日点后不久的这幅影像里,透过望远镜才得见的这颗彗星以北天的小熊座之繁星为背景,曳着美丽的泛绿彗发及暗淡且狭窄的离子尾。然而,这颗彗星最接近地球的时日尚未到来。要等到8月18日,这位太阳系内围的访客,才会来到离我们美丽行星只有3光分左右的位置。根据它与黄道面的倾角及大约85年的轨道週期来衡量,C/2023 E1(ATLAS)咸认是一颗哈雷型彗星。{lamp/}原文:{mtitle title="Comet C/2023 E1 ATLAS near Perihelion"/}Image Credit &Copyright:Dan BartlettExplanation: Comet C/2023 E1 (ATLAS)was just spotted in March,another comet found by the NASA funded Asteroid Terrestrial-impact LastAlert System. On July 1 this Comet ATLAS reached perihelion,its closest approach to the Sun.Days later the telescopic comet wascaptured in this framesporting a pretty greenish comaand faint, narrow ion tail against a background of stars in thefar northern constellation Ursa Minor. This comet's closest approach to Earth is still to come though.On August 18 thisvisitor to the inner Solar Systemwill be a mere 3 light-minutes or so from our fair planet.Based on itsinclination to the ecliptic planeand orbitalperiod of about 85 years C/2023 E1 (ATLAS) isconsidered aHalley-type comet.
2023年07月14日
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2023-07-13
2023年07月13日:韦伯望远镜的心宿增四星云-(Webb's Rho Ophiuchi)
2023年07月13日:韦伯望远镜的心宿增四星云-(Webb's Rho Ophiuchi)--原图下载{mtitle title="韦伯望远镜的心宿增四星云"/}Image Credit:NASA,ESA,CSA,STScI,Klaus Pontoppidan (STScI),Processing: Alyssa Pagan (STScI)说明: 距离我们仅有390光年的蛇夫座心宿增四星云複合体,是最邻近地球的恒星形成区,而类太阳恒星及未来的行星系统正形成于其中。韦伯太空望远镜的近红外相机,最近以空前细緻的尺度,为这个混乱喧嚣的育婴室拍下了这幅红外光影像。并以这幅刚发布壮丽的宇宙快照,来庆贺韦伯望远镜探索宇宙的第一年任务大获成功。这幅影像呈现心宿增四星云不到1光年的区域及大约50颗年轻恒星。其中较亮的恒星,更带着韦伯望远镜特有的衍射芒。源自新诞生恒星的庞大激震分子氢喷流,在此影像里以红色来呈现,此外,还可见到一个大型的泛黄尘埃空穴,及其中心附近清出这个空穴的活跃年轻恒星。在这幅引人讚叹影像的部分恒星附近,甚至可见到它们的原行星盘所投射的影子。(Rho Ophiuchi 心宿增四星云){lamp/}原文:{mtitle title="Webb's Rho Ophiuchi"/}Image Credit:NASA,ESA,CSA,STScI,Klaus Pontoppidan (STScI),Processing: Alyssa Pagan (STScI)Explanation: A mere 390 light-years away,Sun-like stars and future planetary systems are forming inthe Rho Ophiuchi molecular cloud complex,the closest star-forming region to our fair planet.The James Webb Space Telescope's NIRCam peeredinto the nearby natal chaosto capture this infrared image atan inspiring scale.The spectacular cosmic snapshot was released to celebrate the successfulfirst year ofWebb's explorationof the Universe.The frame spansless than a light-year across the Rho Ophiuchi regionand contains about 50 young stars.Brighter stars clearly sport Webb's characteristic pattern ofdiffraction spikes.Huge jets of shocked molecular hydrogenblasting fromnewborn stars are red in the image, withthe large, yellowish dusty cavity carved out by the energeticyoung star near its center.Near some stars in the stunning image are shadows cast by theirprotoplanetary disks.
2023年07月13日
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