首页
关于人生天地间
Search
1
2021年09月08日:仙女大星系方向的深空影像-(The Deep Sky Toward Andromeda)
37 阅读
2
欢迎来到人生天地间
27 阅读
3
2017年11月29日:M42:猎户座大星云-(M42: The Great Orion Nebula)
25 阅读
4
2017年08月06日:银河与炸裂的流星-(Milky Way and Exploding Meteor)
14 阅读
5
2024年02月11日:直指月亮的火箭烟尘影子-(Rocket Plume Shadow Points to the Moon)
11 阅读
默认分类
每日天文图
登录
Search
标签搜索
地球
太阳
尘埃
银河系
光年
dust
Sun
哈伯太空望远镜
影像
Hubble Space Telescope
火星
主题影像
Earth
Milky Way Galaxy
上图
木星
土星
美国
太阳系
人生天地间
累计撰写
10,540
篇文章
累计收到
1
条评论
首页
栏目
默认分类
每日天文图
页面
关于人生天地间
搜索到
7
篇与
的结果
2023-07-06
2023年07月06日:烟火与超级月亮-(Fireworks vs Supermoon)
2023年07月06日:烟火与超级月亮-(Fireworks vs Supermoon)--原图下载{mtitle title="烟火与超级月亮"/}Image Credit &Copyright: Michael Seeley说明: 在7月4日,一轮几乎满相的月亮在地球的夜空中升起。亦名为雄鹿月的这轮明月,满相点(7月3日11:39 UTC)在近地点附近,也就是说,在为期将近一个月的绕地轨道上,月亮来到了最接近地球的位置。所以今年7月的满月是超级月亮,这也是2023年4个超级月亮中的第一个。于7月4日,从佛罗里达州太空海岸的可可亚海滩看出去,这轮美丽的满月儘管大又亮,却无法佔尽风采。因为在拍摄这轮超级月亮东升之时,前景有无比缤纷的烟花表演。(Buck Moon 雄鹿月){lamp/}原文:{mtitle title="Fireworks vs Supermoon"/}Image Credit &Copyright: Michael SeeleyExplanation: On July 4, an almost Full Moon rosein planet Earth'sevening skies.Also known as a Buck Moon, the full lunar phase (full on July 3at 11:39 UTC) was near perigee,the closest point in the Moon'salmost monthly orbit around planet Earth.That qualifiedthis July's Full Moon as a supermoon,the first offour supermoons in 2023.Seen from Cocoa Beach along Florida'sSpace Coast on July 4,any big, bright, beautiful Full Moon would stillhave to compete for attention though.July's super-moonrise was captured hereagainst a super-colorful fireworks display.
2023年07月06日
0 阅读
0 评论
0 点赞
2023-04-07
2023年04月07日:参宿七的大视野影像-(Rigel Wide)
2023年04月07日:参宿七的大视野影像-(Rigel Wide)--原图下载{mtitle title="参宿七的大视野影像"/}Image Credit &Copyright: Rheinhold Wittich说明: 在地球的夜空中,明亮泛蓝的超巨星参宿七位在猎户座的足部。在这幅极深空的广视野影像里,定名为猎户β星的参宿七,位于这片非常深且宽的视野之中心。参宿七的泛蓝星色显示, 它远比在猎户座里与它争辉的泛黄参宿四(猎户α星)炽热,不过二者的质量都够大,最终都会以星核崩塌超新星爆炸的方式结束生命。距离地球约860光年远的参宿七,也比太阳要炽热,半径则是太阳的74倍之多,故其外围大约可伸展到水星轨道附近。在这片呈现星云密布的猎户座之10度宽视野里,猎户大星云位于左上角。在参宿七的右侧,可见到被它明亮泛蓝星光照亮的女巫头星云。参宿七是一个多星系统的成员,不过它的伴星都很昏暗。{lamp/}原文:{mtitle title="Rigel Wide"/}Image Credit &Copyright: Rheinhold WittichExplanation: Brilliant, blue, supergiant star Rigelmarks the foot of Orion the Hunter inplanet Earth's night.Designated Beta Orionis,it's at the center of this remarkablydeep and wide field of view. Rigel's blue color indicates that it is much hotter than itsrival supergiant in Orion the yellowishBetelgeuse (Alpha Orionis),though both stars are massive enough to eventuallyend their daysascore collapse supernovae.Some 860 light-years away, Rigel is hotter than the Sun tooand extends to about 74 times the solar radius.That's about the size of the orbit of Mercury.In the 10 degree wide frame toward the nebula richconstellation, the Orion Nebula is at the upper left.To the right of Rigel and illuminated by its brilliant blue starlightlies the dusty Witch Head Nebula.Rigel is partof a multiple star system, though its companion starsare much fainter.
2023年04月07日
0 阅读
0 评论
0 点赞
2022-12-30
2022年12月30日:火星与星团-(Mars and the Star Clusters)
2022年12月30日:火星与星团-(Mars and the Star Clusters)--原图下载{mtitle title="火星与星团"/}Image Credit &Copyright:Gabor Balazs说明: 到了年关将尽,目前漫游到金牛座的火星,在地球的夜空中依然非常明亮。在这片包括金牛座最亮星毕宿五、毕宿星团(Pleiades;普勒阿得斯)、及昴宿星团在内的星场里,散发泛黄光芒的火星是其中最明亮的天体即可为证。虽然红巨星毕宿五,看似为影像左侧的V形毕宿星团之定锚,不过毕宿五并非毕宿星团的成员。距离我们151光年的毕宿星团,是最邻近我们的疏散星团,而位在相同视线方向的毕宿五,距离不到一半。在影像右侧,亦称为昴宿星团或七姐妹星团的疏散星团M45,其距离约为400光年远。在希腊神话里,普勒阿得斯是泰坦神阿特拉斯和海妖普里俄涅的女儿。{lamp/}原文:{mtitle title="Mars and the Star Clusters"/}Image Credit &Copyright:Gabor BalazsExplanation: At this year'sendMars stillshines brightly inplanet Earth's nightas it wanders through the head-strong constellation Taurus.Its bright yellowish hue dominates thisstarry field of viewthat includes Taurus' alpha star Aldebaran and theHyades and Pleiades star clusters.Whilered giant Aldebaranappears to anchor theV-shape of the Hyadesat the left of the frame, Aldebaran is not a member of the Hyades starcluster.The Hyades cluster is 151 light-years away making it the nearestestablished open star cluster, but Aldebaran lies at less than halfthat distance, along the same line-of-sight. At the right, some 400 light-years distant is the open star clustercataloged as Messier 45,also known as the Pleiades or Seven Sisters.In Greek myth, the Pleiades weredaughters of theastronomicaltitan Atlas and sea-nymphPleione.
2022年12月30日
0 阅读
0 评论
0 点赞
2017-10-11
2017年10月11日:哈伯太空望远镜拍摄的星团NGC 362-(Star Cluster NGC 362 from Hubble)
2017年10月11日:哈伯太空望远镜拍摄的星团NGC 362-(Star Cluster NGC 362 from Hubble)--原图下载{mtitle title="哈伯太空望远镜拍摄的星团NGC 362"/}Image Credit: Hubble WFC3, NASA, ESA, J. Heyl, I. Caiazzo, &Javiera Parada (UBC)说明: 如果太阳是位在NGC 362的中心,地球的夜空会像是由明亮恒星聚成的珠宝盒。其中有数百颗比天狼星还亮,色泽各异的恒星。虽然这些恒星会构成动人的星座和複杂的神话传说,但在此同时,也会让住在该处行星上的住民,无法看见和理解后方更广大的宇宙。NGC 362是我们银河系大约170多个球状星团中的1个,而这个星团可能是在我们银河系形成良久之后,才形成的较年轻球状星团之一。几乎位在小麦哲伦星系前方,视角也离地球天空第二亮的球状星团杜鹃座47不远的NGC 362,是一个肉眼即可见的天体。上面这幅由哈伯太空望远镜拍摄的主题影像,目的是要深入了解在一些球状星团里,为何大质量恒星会出现在星团的中心附近。{lamp/}原文:{mtitle title="Star Cluster NGC 362 from Hubble"/}Image Credit: Hubble WFC3, NASA, ESA, J. Heyl, I. Caiazzo, &Javiera Parada (UBC)Explanation: If our Sun were near the center of NGC 362, thenight sky would glow like a jewel box of bright stars.Hundreds of stars would glow brighter than Sirius, and in many different colors.Although these stars could become part of breathtaking constellations and intricate folklore, it would be difficult for planetary inhabitants there to see -- and hence understand -- the greater universe beyond. NGC 362 is one of only about 170 globular clusters of stars that exist in our Milky Way Galaxy.This star cluster is one of the younger globulars, forming likely well after our Galaxy. NGC 362 can be found with the unaided eye nearly in front of the Small Magellanic Cloud, and angularly close to the second brightest globular cluster known, 47 Tucanae. The featured image was taken with the Hubble Space Telescope to help better understand how massive stars end up near the center of some globular clusters.
2017年10月11日
0 阅读
0 评论
0 点赞
2007-05-04
2007年05月04日:麦克诺特(comet McNaught)彗尾-(The Iron Tail of Comet McNaught)
2007年05月04日:麦克诺特(comet McNaught)彗尾-(The Iron Tail of Comet McNaught)--原图下载{mtitle title="麦克诺特(comet McNaught)彗尾"/}Credit: M. Fulle, F. Leblanc (INAF)et al.,SECCHI /STEREO,NASA说明: 在今年初地球的夜空,麦克诺特彗星(comet McNaught)被STEREO太空船所拍摄。麦克诺特彗星的彗发很亮,它发出的强光在影像底部晕开,形成一条水平的条纹。左上角的金星,也亮到在底片上足以形成一条水平的曝光。但是太灵敏的摄影机正确地记录麦克诺特彗星有名的尾巴,横跨超过三千万公里,向着这张影像的右上角。另一条分开的、较暗、弯曲的彗尾就在主要彗尾的左方,布满尘埃的彗尾被认为是最佳离子尾的例子,由带电原子所形成,因为受到太阳风的吹动。然而,详细的模型说明彗尾确实是因为太阳光压将中性的铁原子游离。铁原子原本被认为是来自于彗核的尘埃颗粒,包含铁硫矿合物,称为六方硫铁矿(troilite, FeS)。{lamp/}原文:{mtitle title="The Iron Tail of Comet McNaught"/}Credit: M. Fulle, F. Leblanc (INAF)et al.,SECCHI /STEREO,NASAExplanation: Outstanding inplanet Earth's sky early this year,Comet McNaughtis captured in this viewfrom the STEREO A spacecraft.McNaught'scoma is sobright, itblooms into thelong horizontal stripe at the bottom of the field.Brilliant Venus, near the top left corner, also produces a severehorizontal blemish in the digital image.But the sensitive camera does accurately record thestriations in McNaught'sfamous dust tail along a regionstretching over 30 million kilometers toward the top right ofthe field of view.A separate, fainter, arching tail just to the left of thedust tail was initially thought to be an example of acommon ion tail,formed by electricallycharged atomscarried away from the comet bythe solar wind.However,detailedmodeling indicates that tail is actually due toneutral iron atoms pushed out by the pressureof sunlight --the first ever detected neutral iron tail from a comet.The iron atoms are thought to originate indust grainsfrom the comet nucleusthat contain the iron-sulfur mineraltroilite (FeS).
2007年05月04日
0 阅读
0 评论
0 点赞
2003-08-30
2003年08月30日:回收仙后座A-(Recycling Cassiopeia A)
2003年08月30日:回收仙后座A-(Recycling Cassiopeia A)--原图下载{mtitle title="回收仙后座A"/}Credit: Hubble Heritage Team(STScI /AURA),R. Fesen(Dartmouth)and J. Morse(CASA, U. Colorado),NASA说明: 数十亿年来,我们银河系内的大质量恒星一直过着绚丽的日子。它们从巨大的宇宙云气塌诞生出来,当它们核心的核子火炉点燃之后,就不停地在核心合成重元素。经过了数百万年后,核燃料用完了,恒星发生了垂死的爆炸,把恒星内部经过加工的物质抛回星际空间,成为下一代恒星形成的材料。上面影像中这个称为仙后座A (Cassiopeia A)的超新星遗骸,就是恒星生命周期中最后阶段的例证之一。 虽然在300百多年前,人类才在地球的夜空中侦测到产生这个遗骸的超新星爆炸,不过实际上这颗死亡恒星的星光,要经过一万年才会传到地球呢。在这张壮丽的哈伯太空望远镜影像里,仙后座 A逐渐冷却的物质丝带和纠结经过上色处理,以方便天文学家了解我们银河内的造星物质是如何被回收的,例如红色的区域代表硫原子所辐射出的光,而蓝色代表来自氧原子的辐射。这张影像所显示区域的大小约在10光年左右。{lamp/}原文:{mtitle title="Recycling Cassiopeia A"/}Credit: Hubble Heritage Team(STScI /AURA),R. Fesen(Dartmouth)and J. Morse(CASA, U. Colorado),NASAExplanation: For billions of years,massive stars in our Milky WayGalaxy have lived spectacular lives. Collapsing from vast cosmicclouds, their nuclear furnacesignite and create heavy elements in their cores.After a few million years, theenriched material is blastedback into interstellar space where star formationbegins anew.The expanding debris cloud knownasCassiopeia A is an exampleof this final phase of the stellar life cycle.Light from the explosion which created this supernova remnant wasprobably firstseenin planet Earth's sky just over 300 years ago,although it took that light more than 10,000 years to reach us.In this gorgeousHubble Space Telescope image of cooling filamentsand knots in the Cas A remnant, lightfrom specific elements has been color coded to help astronomersunderstand the recycling of our galaxy'sstar stuff.For instance, red regions are dominated by emission from sulfur atomswhile blue shades correspond to oxygen.Thearea shown is about 10 light-years across.
2003年08月30日
0 阅读
0 评论
0 点赞
1
2