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)
39 阅读
2
欢迎来到人生天地间
29 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)
15 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)
12 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
10,553
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
5
篇与
的结果
2024-01-26
2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)
2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)--原图下载{mtitle title="毕宿一:有行星的恆星"/}Image Credit &Copyright: Reg Pratt说明: 毕宿一距离我们146光年。毕宿一是K型的红巨星,温度比太阳低,半径约为太阳的13倍,光度则几乎是太阳的100倍。这颗专有名为艾因(Ain)的巨星,是毕宿疏散星团的成员之一,它与更明亮的巨星毕宿五构成金牛的眼睛。周围环绕着金牛座尘埃云的毕宿一,拥有一颗行星。2006年用径向速度量测法所发现的这颗行星毕宿一b,是一颗比木星大、轨道週期为1.6年的气态巨行星。虽然不能直接看到这颗系外行星,但在幽暗的夜晚,用肉眼可轻易见到它的母星毕宿一。{lamp/}原文:{mtitle title="Epsilon Tauri: Star with Planet"/}Image Credit &Copyright: Reg PrattExplanation: Epsilon Taurilies 146 light-years away.A K-typered giantstar, epsilon Tau is cooler than the Sun, but withabout 13 times the solar radius it shines with nearly 100 times the solarluminosity.A member of theHyadesopen star cluster the giant star is known by theproper name Ain,and along with brighter giant star Aldebaran,forms the eyes of Taurus the Bull.Surrounded by dusty, dark clouds in Taurus, epsilon Tauis also known to have a planet.Discovered byradial velocitymeasurements in 2006,epsilon Tauri bis a gas giant planet larger than Jupiterwith an orbital period of 1.6 years.And though the exoplanet can't be seen directly, on a dark nightits parent star epsilon Tauri is easily visible to the unaided eye.
2024年01月26日
4 阅读
0 评论
0 点赞
2024-01-16
2024年01月16日:肉眼几乎可见的猎户座-(The Orion You Can Almost See)
[2024年01月16日:肉眼几乎可见的猎户座-(The Orion You Can Almost See)--原图下载](https://apod.nasa.gov/apod/image/2401/OrionMcc_Guzzini_1366.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2401/OrionMcc_Guzzini_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2401/OrionMcc_Guzzini_960.jpg';){mtitle title="肉眼几乎可见的猎户座"/}Image Credit & Copyright: Michele Guzzini说明: 你认得这个星座吗?儘管它是天空中最容易辨认的星群之一,但这种与肉眼所见比较更加完整的猎户座,只有透过长曝光数位相机成像及电脑后製处理才得以显现。在此影像里,带着深橙色调的低温红巨星参宿四,是位于左上角的最明亮恒星。猎户座的炽热泛蓝恒星数量众多,其中,右下角的超巨星参宿七,亮度足以和左上角的参宿四相抗衡,而右上角的亮星则是参宿五。距离我们全约为1,500光年远的猎户腰带三星,皆诞生于猎户座备受研究的星际云里。猎户腰带下方有一片明亮但模糊的光斑,它看来或许也有点眼熟,这是因为它是名为猎户大星云的恒星孕育室。最后是肉眼勉强可见但相当引人注目的巴纳德环,这团环拱在猎户腰带和猎户大星云周围的庞大发射星云,是由猎户座摄影先锋巴纳德发现于100多年前。(Betelgeuse 参宿四; Rigel 参宿七; Bellatrix 参宿五; Barnard's Loop 巴纳德环; Hatysa 伐三; Alnitak 参宿一; Alnilam 参宿二; Mintaka 参宿三; Saiph 参宿六; Cursa 玉井三-波江座){lamp/}原文:{mtitle title="The Orion You Can Almost See"/}Image Credit & Copyright: Michele GuzziniExplanation: Do you recognize this constellation? Although it is one of the most recognizable star groupings on the sky, this is a more full Orion than you can see -- an Orion only revealed with long exposure digital camera imaging and post-processing. Here the cool red giant Betelgeuse takes on a strong orange tint as the brightest star on the upper left. Orion's hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse on the lower right, and Bellatrix at the upper right.Lined up in Orion's belt are three stars all about 1,500 light-years away, born from the constellation's well-studied interstellar clouds.Just below Orion's belt is a bright but fuzzy patch that might also look familiar -- the stellar nursery known as Orion's Nebula. Finally, just barely visible to the unaided eye but quite striking here is Barnard's Loop -- a huge gaseous emission nebula surrounding Orion's Belt and Nebula discovered over 100 years ago by the pioneering Orion photographer E. E. Barnard.
2024年01月16日
0 阅读
0 评论
0 点赞
2019-08-21
2019年08月21日:肉眼几乎可见的猎户座-(The Orion You Can Almost See)
[2019年08月21日:肉眼几乎可见的猎户座-(The Orion You Can Almost See)--原图下载](https://apod.nasa.gov/apod/image/1908/OrionDeep_GleasonAndreo_2048.jpg"onMouseOver="if (document.images)document.imagename1.src='image/1908/OrionDeep_GleasonAndreo_1080_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/1908/OrionDeep_GleasonAndreo_1080.jpg';){mtitle title="肉眼几乎可见的猎户座"/}Image Credit & Copyright: John Gleason&RogelioBernal Andreo说明: 你认得这个星座吗?纵然它是地球天空中,最容易辨识的星群之一,但这幅使用数位相机进行长曝光成像及后续影像处理的影像,呈现的猎户座超出人类肉眼所能见。在影像中,低温的红巨星参宿四,是左下角带着鲜明橙色的最明亮恒星。猎户座里有难以数计的炽热泛蓝恒星,其中有位在右上角和参宿四斜角对峙的超巨星参宿七,以及左上角的参宿五。而构成猎户腰带的腰带三星,距离都在1,500光年上下,全都诞生于这个星座被研究得很透澈的星际云里。猎户腰带右方的泛红弥漫光斑,或许看来有些眼熟,因为它就是猎户大星云。最后,肉眼勉强可见,但在这幅影像里却是无比醒目的巴纳德圈,是个环拱猎户腰带和猎户大星云的庞大发射云弧,由首先为猎户座造像的摄影师巴纳德,发现于100多年前。{lamp/}原文:{mtitle title="The Orion You Can Almost See"/}Image Credit & Copyright: John Gleason&RogelioBernal AndreoExplanation: Do you recognize this constellation? Although it is one of the most recognizable star groupings on the sky, this is a more full Orion than you can see -- an Orion only revealed with long exposure digital camera imaging and post-processing. Here the cool red giant Betelgeuse takes on a strong orange tint as the brightest star at the lower left. Orion's hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse on the upper right, and Bellatrix at the upper left.Lined up in Orion's belt are three stars all about 1,500 light-years away, born from the constellation's well-studied interstellar clouds.To the right of Orion's belt is a bright but fuzzy patch that might also look familiar -- the stellar nursery known as Orion's Nebula. Finally, just barely visible to the unaided eye but quite striking here is Barnard's Loop -- a huge gaseous emission nebula surrounding Orion's Belt and Nebula discovered over 100 years ago by the pioneering Orion photographer E. E. Barnard.
2019年08月21日
0 阅读
0 评论
0 点赞
2018-10-31
2018年10月31日:天兔座R: 吸血鬼之星-(R Leporis: A Vampire's Star)
2018年10月31日:天兔座R: 吸血鬼之星-(R Leporis: A Vampire's Star)--原图下载{mtitle title="天兔座R: 吸血鬼之星"/}Image Credit &Copyright: Martin Pugh说明: 更常称为欣德深红星的天兔座R,是地球天空中一颗很罕见的恒星,它的色泽是触目惊心的血红。19世纪发现这颗恒星的英国天文学家欣德,如是描述它:「它在望远镜里…酷似黝黑视野中的一滴血。」位在 天兔座1,360光年远处的这颗恒星,是一颗鲸鱼座ο(蒭藁)型变星,亮度的变化周期长达14个月左右。天兔座R目前的分类是碳星,一种演化晚期、拥有极端丰富碳含量的极低温红巨星。碳星大量的碳,产生于这颗垂死恒星核心周围的氦融合层,然后经由上翻过程传送到恒星的外层。上翻过程也造就了大量诸如:一氧化碳、碳氢、氰化物和双碳分子这类的简单碳化合物。就如我们所知,低温恒星主要在红光和红外波段辐射能量,而碳星大气中的碳分子更完全吸收本来就极其少量的蓝光,因此造就了碳星独特的深红色泽。由于强烈的恒星风,天兔座R的富碳大气正在散逸和混合到周围的星际物质里,它也可能即将变成行星状星云。喔,对了!每日天文图的编辑们,顺祝读者万圣节快乐。(R Leporis、Hind's Crimson Star 天兔座R){lamp/}原文:{mtitle title="R Leporis: A Vampire's Star"/}Image Credit &Copyright: Martin PughExplanation: Better known asHind's CrimsonStar, R Leporis is a rare star in planet Earth's night sky.It's also a shocking shade of red.The star's discoverer,19th century English astronomerJohn RussellHind, reported that it appearedin a telescope "... like a drop of blood on a black field."Located1,360 light-years away in theconstellationLepus the star is a Mira-type variable,changing its brightness over a period of about 14 months.R Leporis is now recognized asa carbon star,a very cool and highly evolvedred giantwith an extreme abundance of carbon.Extra carbon in carbon stars is created byheliumfusion near the dying stellar core and dredged up into thestars' outer layers.The dredge-up results in an overabundance of simple carbon molecules,like CO, CH, CN, and C2.While it's truethat cool stars radiate most of their energy inred and infrared light, the carbon moleculesstrongly absorb what little blue light is left and givecarbon stars an exceptionally deep red color. R Leporis is losing its carbon-rich atmosphere into the surroundinginterstellar material through a strong stellar wind though,and could be near the transition to aplanetary nebula.Oh, and Happy Halloween from the folks at APOD.
2018年10月31日
0 阅读
0 评论
0 点赞
2018-03-21
2018年03月21日:相机镜头里的猎户座-(Camera Orion)
[2018年03月21日:相机镜头里的猎户座-(Camera Orion)--原图下载](https://apod.nasa.gov/apod/image/1803/OrionMosaic_Lim_957.jpg"onMouseOver="if (document.images)document.imagename1.src='image/1803/OrionMosaic_Lim_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/1803/OrionMosaic_Lim_960.jpg';){mtitle title="相机镜头里的猎户座"/}Image Credit & Copyright: Derrick Lim说明: 你认得这个星座吗?纵然它是地球天空中最容易辨识的星群之一,但猎户座的标誌性天体,在人眼中远没有在相机镜头里来得色彩缤纷。在这幅由20张照片数位接合的拼接影像里,低温的红巨星参宿四,是左上角带着鲜明橙色的明亮恒星。猎户座里有难以数计的炽热泛蓝恒星,其中有位在右下角和参宿四斜角对峙的超巨星参宿七,右上角的参宿五,与及构成猎户腰带的腰带三星,而它们的距离都在1,500光年上下,也都诞生于这个星座被研究得很透澈的星际云里。猎户腰带下方的泛红弥曼光斑或许看来有些眼熟,这是因为它就是猎户座大星云。最后,肉眼勉强可见,但在相机镜头却是无比醒目的巴纳德圈,是个环拱猎户腰带和猎户座大星的庞大发射云弧,大约是在100多年前,由首先为猎户座造像的摄影师巴纳德所发现。{lamp/}原文:{mtitle title="Camera Orion"/}Image Credit & Copyright: Derrick LimExplanation: Do you recognize this constellation? Although it is one of the most recognizable star groupings on the sky, Orion's icons don't look quite as colorful to the eye as they do to a camera. In this 20-image digitally-composed mosaic, cool red giant Betelgeuse takes on a strong orange tint as the brightest star at the upper left. Orion's hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse at the lower right, and Bellatrix at the upper rightLined up in Orion's belt are three stars all about 1,500 light-years away, born from the constellation's well-studied interstellar clouds.Below Orion's belt a reddish and fuzzy patch that might also look familiar -- the stellar nursery known as Orion's Nebula. Finally, just barely visible to the unaided eye but quite striking here by camera is Barnard's Loop -- a huge gaseous emission nebula surrounding Orion's Belt and Nebula discovered over 100 years ago by the pioneering Orion photographer E. E. Barnard.
2018年03月21日
0 阅读
0 评论
0 点赞