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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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2023-08-26
2023年08月26日:金星的蛾眉位相-(Crescents of Venus)
2023年08月26日:金星的蛾眉位相-(Crescents of Venus)--原图下载{mtitle title="金星的蛾眉位相"/}Image Credit &Copyright: Roberto Ortu说明: 类似月亮有位相变化一样,金星可见的日耀区也会有盈亏。这组望远镜影像序列,呈现金星在2023年以昏星之姿出现的期间,日耀区渐次变化的景象。在地球与太阳之间的内行星轨道运行的金星,在这段期间的张角之所以会变大,是因为它越来越靠近地球。而它的蛾眉相之所以会愈来愈细,则是因为金星逐渐靠近我们往太阳的视线。它在8月13日来到最接近地球的下合位置,以大约8度的间距从太阳下方通过。如今金星已在清晨的东方地平线上方绽放光芒,结束了成为地球晨星的过渡。在8月21日,美国航太总署的帕克太阳探测器进行了对金星的第六次重力辅助飞越,并利用这次的相遇,操控探测器往记录上最靠近太阳的位置移动。{lamp/}原文:{mtitle title="Crescents of Venus"/}Image Credit &Copyright: Roberto OrtuExplanation: Just as the Moon goesthrough phases, Venus' visible sunlit hemispherewaxes and wanes.This sequence oftelescopicimagesillustrates the steady changes for Venus duringits recent 2023 apparition as our evening star.Gliding along its interior orbit between Earth and Sun, Venus growslarger during that period because it is approaching planet Earth.Its crescent narrows though, as the inner planet swings closer to ourline-of-sight to the Sun.Closest to the Earth-Sun line but passing about 8 degrees south of theSun, on August 13 Venus reached its (non-judgmental)inferior conjunction.And now Venus shines above the eastern horizon inpredawn skies, completing its transition to planet Earth'smorning star.On August 21, NASA's Parker Solar Probe completed its sixthgravity assist flyby of Venus, using the encounter to maneuverthe probe toward itsclosest approach yet to the Sun.
2023年08月26日
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2023-05-26
2023年05月26日:室女座星系团-(Virgo Cluster Galaxies)
2023年05月26日:室女座星系团-(Virgo Cluster Galaxies)--原图下载{mtitle title="室女座星系团"/}Image Credit &Copyright: Abdullah Alharbi说明: 在这幅宽将近4度的望远镜影像里,室女星系团的成员星系散布在视野各处。距离约5千万光年远的室女星系团,是离我们的本星系群最近的大星系团。在室女星系团最明亮的椭圆星系之中,出现在视野里的有中下方的M87,以及左上角(从上至下)的M84与M86。M84和M86都是影像左方的吸睛马卡莱恩星系鍊之一部分。在马卡莱恩星系鍊中段的互扰星系对NGC 4438和NGC 4435,则拥有马卡莱恩之眼的令名。此外,位在室女星系团最具主宰性的庞大椭圆星系M87中心之超大质黑洞,是地面事件视界望远镜进行成像的第一个黑洞。{lamp/}原文:{mtitle title="Virgo Cluster Galaxies"/}Image Credit &Copyright: Abdullah AlharbiExplanation: Galaxies of the Virgo Clusterare scattered across this nearly 4 degree widetelescopic field of view.About 50 million light-years distant, the Virgo Cluster is theclosest large galaxy cluster to our own local galaxy group.Prominent here are Virgo's bright elliptical galaxiesMessier catalog,M87 at bottom center, and M84 and M86 (top to bottom)near top left.M84 and M86 are recognized as part ofMarkarian's Chain,a visually striking line-up of galaxies on theleft side of this frame.Near the middle of the chain lies an intriguing interacting pair of galaxies,NGC 4438 and NGC 4435,known to some as Markarian's Eyes.Of course giant elliptical galaxy M87dominates the Virgo cluster.It's the home of a super massive black hole,the first black hole ever imaged by planet Earth'sEvent Horizon Telescope.
2023年05月26日
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2023-05-13
2023年05月13日:阿波罗17号影像:蛾眉相的地球-(Apollo 17: The Crescent Earth)
2023年05月13日:阿波罗17号影像:蛾眉相的地球-(Apollo 17: The Crescent Earth)--原图下载{mtitle title="阿波罗17号影像:蛾眉相的地球"/}Image Credit: Apollo 17,NASA;Restoration -Toby Ord说明: 在这幅令人讚叹、以黝黑太空为背景的的照片里,我们美丽的地球拥有弯弯的蛾眉相。在这个陌生的视角里,地球形似望远镜影像里的遥远行星,纵目可见的地平线全在视野之内。 目前只有低地球轨道国际太空站上的组员,才能以更接近的视角观赏地球。在每90分钟绕行地球一圈的太空站上,视野下方有不停掠过的云海、海洋和陆块,以及远方弧状的地球临边。 这幅经过数位修复的影像,呈现至今只有24位阿波罗计画的太空人,在1968年至1972年往返月球途中,才有幸见到的景观。上面影像的原图(AS17-152-23420),是在1972年12月17日由阿波罗17号的组员摄于返程之时。截自目前为止,它是以这个行星际视角人类亲手拍摄的最后一张地球影像。{lamp/}原文:{mtitle title="Apollo 17: The Crescent Earth"/}Image Credit: Apollo 17,NASA;Restoration -Toby OrdExplanation: Our fair planetsports a curved, sunlit crescentagainst the black backdrop of space in this stunning photograph.From the unfamiliar perspective,the Earth is smalland, like atelescopic image of a distant planet,the entire horizon is completely within the field of view.Enjoyed bycrews on boardthe International Space Station,only much closer views of the planet are possible from low Earth orbit.Orbiting the planet once every 90 minutes, a spectacle of clouds, oceans,and continentsscrolls beneath themwith the partial arc of the planet's edge in the distance.But this digitally restored imagepresents a view so faronly achieved by 24 humans,Apollo astronautswho traveled to the Moon and back again between 1968 and 1972.The original photograph,AS17-152-23420,was taken by the homeward bound crew ofApollo 17, on December 17, 1972.For now it is the last picture of Earth from thisplanetary perspective taken by human hands.
2023年05月13日
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2022-09-01
2022年09月01日:郁金香星云与天鹅X-1-(The Tulip and Cygnus X-1)
2022年09月01日:郁金香星云与天鹅X-1-(The Tulip and Cygnus X-1)--原图下载{mtitle title="郁金香星云与天鹅X-1"/}Image Credit &Copyright: Peter Kohlmann说明: 这幅以明亮发射星云为主题的望远镜影像,远眺银河盘面上满布星云的天鹅座。这团称为郁金香星云的明亮气体与尘埃云,也是天文学家夏普勒斯在1959年发表的星表里,编录号为Sh2-101的天体。这朵宽约70光年形状複杂的美丽“花朵”,约绽放在8,000光年远处。 位在天鹅OB3星协边缘的年轻活跃O型星HDE 227018,,所发出的紫外辐射电离并驱动郁金香星云发光。 此外,在这片视野里,还有地球天空中最强烈的X射线源之一、微类星体天鹅X-1。 在影像右侧的郁金香星云花瓣外头,可隐约见到受到一颗隐藏黑洞的强烈喷流之冲击,所形成的泛蓝弓形激震波前沿。{lamp/}原文:{mtitle title="The Tulip and Cygnus X-1"/}Image Credit &Copyright: Peter KohlmannExplanation: Framing a bright emission region,this telescopic viewlooks out alongthe plane of our Milky Way Galaxy toward the nebula rich constellationCygnus the Swan.Popularly called the Tulip Nebula,the reddish glowing cloud of interstellar gas and dustis also found in the1959 catalogby astronomer Stewart Sharplessas Sh2-101.Nearly 70 light-years across, the complex and beautiful Tulip Nebulablossoms about 8,000 light-years away.Ultraviolet radiation from young energetic stars at the edge of the CygnusOB3 association,includingO star HDE 227018,ionizes the atomsand powers the emission from the Tulip Nebula.Also in the field of view is microquasarCygnus X-1,one of the strongest X-ray sources in planet Earth's sky.Blasted by powerful jets from alurking black holeits fainter bluish curved shock front isonly just visible though, beyondthe cosmic Tulip's petals near the right side of the frame.
2022年09月01日
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2022-06-18
2022年06月18日:天津一与星云-(The Gamma Cygni Nebula)
2022年06月18日:天津一与星云-(The Gamma Cygni Nebula)--原图下载{mtitle title="天津一与星云"/}Image Credit &Copyright: Min Xie,Chen Wu, Yizhou Zhang, and Benchu Tang说明: 超巨星天津一位在"北十字"的中心。而这个着名的星官则座落在银河系盘面附近,位在夏季北半球夜空高悬的天鹅座之内。在这幅由窄与宽波段滤镜数据整合而成的彩色望远镜影像里,英文专名为Sadr的天津一,位在这片星野的中心下方。 这幅涵盖约3度(6个满月)天区的影像,所记录的天体还包括发射星云IC 1318和疏散星团NGC 6910。佔据视野顶端、形似2片宇宙级发光翅膀、为一道颀长黝黑尘埃带所分隔的IC 1318 ,并不难理解为何其俗名为蝴蝶星云。在天津一右方,可见到年轻仍紧密聚集的NGC 6910之成员星。天津一的距离约为560秒差距(1,800光年)。而IC 1318和NGC 6910的估计距离,则介于2,000到5,000光年之间。(Gamma Cygni 天津一){lamp/}原文:{mtitle title="The Gamma Cygni Nebula"/}Image Credit &Copyright: Min Xie,Chen Wu, Yizhou Zhang, and Benchu TangExplanation: Supergiant starGamma Cygni is at the center of the Northern Cross.Near the plane of our Milky Way galaxy, that famousasterism flieshigh in northern summer night skies in the constellationCygnus the Swan.Known by the propername Sadr,Gamma Cygni also lies just below center inthis telescopic skyscape,with colors mapped from both broadband and narrowband image data.The field of view spans about 3 degrees(six Full Moons) on the sky and includesemission nebula IC 1318 and open star cluster NGC 6910.Filling the upper part of the frame and shaped like two glowingcosmic wings divided by a long darkdust lane, IC 1318's popular name is understandably theButterfly Nebula.Right of Gamma Cygni, are the young, still tightly groupedstars of NGC 6910.The distanceto Gamma Cygni is around 560 parsecs or 1,800 light-years.Estimates for IC 1318 andNGC 6910range from 2,000 to 5,000 light-years.
2022年06月18日
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2022-04-30
2022年04月30日:M44: 鬼宿星团-(M44: The Beehive Cluster)
2022年04月30日:M44: 鬼宿星团-(M44: The Beehive Cluster)--原图下载{mtitle title="M44: 鬼宿星团"/}Image Credit &Copyright:Drew Evans说明: 距离只有600光年远的M44,是离我们太阳系最近的星团之一。鬼宿星团 (M44、蜂巢星团)的成员星都相当年轻,年龄大约在6亿年左右,相较之下,我们太阳的年龄已有45亿年高龄。由于它的年龄及在空间的运动,都和金牛座内离我们更近的毕宿星团类似,所以它们可能是诞生于同一个大分子云里。疏散星团M44的1,000多颗成员星,分布在15光年的区域之内,大约在巨蟹座绵延了3个满月(1.5度)的天区。肉眼即可见的M44,是个自古即知的天体,早在18世纪被梅西叶编进他的星表成为第44号天体之前,对它的描述为“一团黯淡的云气或天空云雾”,而要等到使用望远镜观测后,它的成员星才被解析出来。在现代,它是使用双筒望远镜观星者的一个热门标的。在这幅望远镜影像里,星团内少数的泛黄低温红巨星,夹杂在视野里较亮的蓝主序星之间。用于突显此星团较明亮成员星的吸睛绕射芒,是用悬在望远镜物镜前方的十字交叉细绳所产生的。(Praesepe 鬼宿星团、the Beehive cluster 蜂巢星团){lamp/}原文:{mtitle title="M44: The Beehive Cluster"/}Image Credit &Copyright:Drew EvansExplanation: A mere 600 light-years away,M44 is one of the closeststar clusters to our solar system.Also known as thePraesepeor the Beehive cluster its starsare young though, about 600 million years old compared to our Sun's4.5 billionyears.Based on similar ages and motion through space, M44 and theeven closer Hyades star cluster in Taurusare thought to havebeen born together in the same large molecular cloud.An open clusterspanning some 15 light-years, M44 holds 1,000 stars or soand covers about 3 full moons (1.5 degrees) on thesky in the constellation Cancer.Visible to the unaided eye, M44 has been recognized since antiquity.Described as a faint cloud or celestial mist long beforebeing included as the 44th entry inCharles Messier's18th century catalog, the cluster was not resolved into its individualstars until telescopes were available.A popular target for modern, binocular-equipped sky gazers,the cluster's fewyellowish tinted, cool,red giants are scatteredthrough the field of its brighter hot blue main sequencestars in thistelescopic group snapshot.Dramaticdiffraction spikeshighlighting the brighter cluster memberswere created with string crossed in front of the telescope's objectivelens.
2022年04月30日
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