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
26 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)
13 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
10,538
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
183
篇与
的结果
2024-01-29
2024年01月29日:昴宿星团:有尘埃环绕的七姐妹星团-(The Pleiades: Seven Dusty Sisters)
2024年01月29日:昴宿星团:有尘埃环绕的七姐妹星团-(The Pleiades: Seven Dusty Sisters)--原图下载{mtitle title="昴宿星团:有尘埃环绕的七姐妹星团"/}Image Credit & Copyright: Craig Stocks说明: 着名的昴宿星团正在缓缓摧毁路过的部分气体与尘埃云。昴宿星团是地球天空中最明亮的疏散星团之一,几乎在北半球的任何地方,都能用肉眼看到它的身影。在过去的100,000年里,一大片气体与尘埃恰好穿过昴宿星团,造成恒星和尘埃之间的强烈反应。这团路过的云,可能是雷德克利夫波的一部分,而拉德克利夫波则是不久才发现的、连接了我们邻近银河系的数个恒星形成区之气体和尘埃结构。来自恒星光压会显着的排斥周围泛蓝反射星云里的尘埃,其中颗粒较小的尘埃,所受到的排斥力较大。短期的结果是部分的尘埃云纠结成丝状并发生分层。这张整合了将近9小时长曝光数据的主题深空影像,是在去年由美国 犹他州的犹他沙漠远距天文台所拍摄的。(Radcliffe wave 雷德克利夫波){lamp/}原文:{mtitle title="The Pleiades: Seven Dusty Sisters"/}Image Credit & Copyright: Craig StocksExplanation: The well-known Pleiades star cluster is slowly destroying part of a passing cloud of gas and dust.The Pleiades is the brightest open cluster of stars on Earth's sky and can be seen from almost any northerly location with the unaided eye. Over the past 100,000 years, a field of gas and dustis moving by chance right through the Pleiades star cluster and is causing a strong reaction between the stars and dust.The passing cloud might be part of the Radcliffe wave, a newly discovered structure of gas and dust connecting several regions of star formation in the nearby part of our Milky Way galaxy. Pressure from the stars' light significantly repels the dust in the surrounding bluereflection nebula, with smaller dust particles being repelled more strongly. A short-term result is that parts of the dust cloud have become filamentary and stratified.The featured deep image incorporates nearly 9 hours of exposure and was captured from Utah Desert Remote Observatory in Utah, USA, last year.
2024年01月29日
1 阅读
0 评论
0 点赞
2024-01-01
2024年01月01日:NGC 1232:宏伟的螺旋星系-(NGC 1232: A Grand Design Spiral Galaxy)
2024年01月01日:NGC 1232:宏伟的螺旋星系-(NGC 1232: A Grand Design Spiral Galaxy)--原图下载{mtitle title="NGC 1232:宏伟的螺旋星系"/}Image Credit: FORS,8.2-meter VLT Antu,ESO说明: 星系之所以令人着迷,除了它们具有美丽的外观之外,也因为它们具有不可见的内涵。由极大望远镜之一所拍摄的宏伟螺旋星系NGC 1232,就是一个很好的例证。上面影像里的可见物质,绝大部分是数以百万计的亮星和黝黑的尘埃,以及它们所聚成、绕着星系核心打转的螺旋臂。而蓝色亮星所组成的疏散星团则散布在旋臂上,它们之间夹杂着由緻密星际尘埃所聚成的尘埃带。此外,这个星系还有数十亿颗不显眼但可侦测的恒星及大量的星际气体,它们加总的巨大质量,主宰了星系核心区的动力学行为。不过现行的最可信的学说指出,星系还拥有更大量形态不明的不可见物质。之所有假设有这种弥漫的暗物质之存在,部分原因是要解释星系外围区可见物质的运动。{lamp/}原文:{mtitle title="NGC 1232: A Grand Design Spiral Galaxy"/}Image Credit: FORS,8.2-meter VLT Antu,ESOExplanation: Galaxies are fascinating not only forwhat is visible, but for what is invisible.Grand spiral galaxyNGC 1232,captured in detail by one of the Very Large Telescopes,is a good example. The visible is dominated by millions ofbright stars and darkdust,caught up in a gravitational swirl ofspiral arms revolving about the center.Open clusters containingbright blue stars can be seen sprinkled along these spiral arms,while dark lanesof dense interstellardustcan be seen sprinkled between them.Less visible, but detectable, are billions of dim normalstars and vast tracts ofinterstellar gas,together wielding such high mass that theydominate the dynamics of the innergalaxy. Leading theories indicate that even greater amounts of matter are invisible, in a form we don't yet know.This pervasivedark matter is postulated, in part, to explain themotionsof the visible matter in the outer regions of galaxies.
2024年01月01日
5 阅读
0 评论
0 点赞
2023-05-15
2023年05月15日:M16:老鹰星云的深场影像-(M16: Eagle Nebula Deep Field)
2023年05月15日:M16:老鹰星云的深场影像-(M16: Eagle Nebula Deep Field)--原图下载{mtitle title="M16:老鹰星云的深场影像"/}Image Credit & Copyright: Gianni Lacroce说明: 从远处望过去,它形似一只老鹰。然而,仔细检视老鹰星云,就会发现其内的亮区,其实是可以望进较大黝黑尘埃壳中心的窗口。透过这个窗口,可见到一座明亮的恒星工厂,正在该处製作整个疏散星团。在这个空穴里,颀长的云柱、浑圆的云球、及冰冷的分子气体,仍伫留在恒星形成之处。此外,数颗已曝露出的年轻蓝色亮星,正以星光和恒星风,把剩下的云气丝、气体和尘埃壁烧去及后推。编录号为M16的老鹰发射星云,大小约20光年,用双筒望远镜即可在北天巨蛇 座方向约6,500光年远处看见它的身影。这张长曝光影像,结合了硫(黄)、 氢(红)及氧(蓝)在3个特定波长的辐射。{lamp/}原文:{mtitle title="M16: Eagle Nebula Deep Field"/}Image Credit & Copyright: Gianni LacroceExplanation: From afar, the whole thing looks like an eagle. A closer look at the Eagle Nebula,however, shows thebrightregion is actually a window into the center of a larger dark shell of dust. Through this window, a brightly-lit workshop appearswhere a whole open cluster of stars is being formed. In this cavity,tallpillars and round globules of dark dust and cold molecular gasremain where stars are still forming. Already visible are several young bright blue stars whose light and winds are burning away and pushing back the remaining filaments and walls of gas and dust. The Eagle emission nebula,tagged M16, lies about 6500light years away, spans about 20 light-years,and is visible withbinoculars towardthe constellation of the Serpent(Serpens). This picture involved long and deep exposures and combined three specific emitted colors emitted by sulfur (colored as yellow), hydrogen (red), and oxygen (blue).
2023年05月15日
0 阅读
0 评论
0 点赞
2023-02-06
2023年02月06日:蔷薇星云的中心-(In the Heart of the Rosette Nebula)
2023年02月06日:蔷薇星云的中心-(In the Heart of the Rosette Nebula)--原图下载{mtitle title="蔷薇星云的中心"/}Image Credit & Copyright: Lyman Insley说明: 蔷薇星云中心的明亮疏散星团,点亮了整个星云。而NGC 2244NGC 2244的恒星,则是在数百万年前才刚从周围的云气中诞生出来。这幅 摄于2014年1月的多重曝光影像,记录了硫(红色系)、氢(绿)及氧(蓝)发出的特徵辉光,以呈现中心区的极精细结构。从星团成员星泛流而出的炽热粒子恒星风,除了把气体和尘埃丝搅得更加混乱之外,也缓慢的蒸发掉星团中心的物质。这片蔷薇星云中心景观的跨幅约有50光年,离我们则有5,200光年远,用双筒望远镜即可以在麒麟座方向看见它。{lamp/}原文:{mtitle title="In the Heart of the Rosette Nebula"/}Image Credit & Copyright: Lyman InsleyExplanation: In the heart of the Rosette Nebula lies a bright cluster of stars that lights up the nebula. The stars of NGC 2244 formed from the surrounding gas only a few million years ago. The featured image taken in mid-January using multiple exposures and very specific colors of Sulfur (shaded red), Hydrogen (green), and Oxygen (blue),captures the central region in tremendous detail.A hot wind of particles streams away from the cluster stars and contributes to an already complex menagerie of gas and dust filaments while slowly evacuating the cluster center. The Rosette Nebula's center measures about 50 light-years across, lies about 5,200 light-years away, and is visible with binoculars towards the constellation of the Unicorn (Monoceros).
2023年02月06日
0 阅读
0 评论
0 点赞
2022-10-04
2022年10月04日:移除恆星的老鹰星云-(Star-Forming Eagle Nebula without Stars)
[2022年10月04日:移除恆星的老鹰星云-(Star-Forming Eagle Nebula without Stars)--原图下载](https://apod.nasa.gov/apod/image/2210/M16Eagle_Akar_3365_starless.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2210/M16Eagle_Akar_960.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2210/M16Eagle_Akar_960_starless.jpg';){mtitle title="移除恆星的老鹰星云"/}Image Credit & Copyright: Yannick Akar说明: 它的整体外观像一只老鹰。然而,如再细看老鹰星云即可发现其内的亮区,实际上是一扇通往大型黝黑尘埃壳中心的窗口。透过这扇窗户,一座灯火通明的恒星工厂历历在目,而且一整个疏散星团正形成于其中。 在这个洞穴里,高耸的云柱及浑圆的尘埃及低温分子气体云球,仍环拱在正形成的恒星之周围。 矛盾的是,如果没有恒星的干扰,或许更能领会这座令人印象深刻的恒星形成工厂,因此这幅主题影像里的恒星,已用数位技术加以移除。约6500光年远、宽约20光年、编录号为M16的老鹰星云,是一个用双筒望远镜即可在北天巨蛇 座方向见到的发射星云。製作这幅影像共使用了超过22小时的时间曝光成像,并整合了氢(红)和氧(蓝)发出的特徵辐射。{lamp/}原文:{mtitle title="Star-Forming Eagle Nebula without Stars"/}Image Credit & Copyright: Yannick AkarExplanation: The whole thing looks like an eagle. A closer look at the Eagle Nebula's center,however, shows thebrightregion is actually a window into the center of a larger dark shell of dust. Through this window, a brightly-lit workshop appearswhere a whole open cluster of stars is being formed. In this cavity tall pillars and round globules of dark dust and cold molecular gasremain where stars are still forming. Paradoxically, it is perhaps easier to appreciate this impressive factory of star formation by seeing it without its stars -- which have been digitally removed in the featured image.The Eagle emission nebula,tagged M16, lies about 6500light years away, spans about 20 light-years, and is visible withbinoculars towardthe constellation of the Serpent(Serpens). Creating this picture involved over 22 hours of imaging and combining colors emitted specifically by hydrogen (red), and oxygen (blue).
2022年10月04日
0 阅读
0 评论
0 点赞
2022-09-25
2022年09月25日:老鹰星云的仙女-(The Fairy of Eagle Nebula)
2022年09月25日:老鹰星云的仙女-(The Fairy of Eagle Nebula)--原图下载{mtitle title="老鹰星云的仙女"/}Image Credit: Image Credit: NASA, ESA, The Hubble Heritage Team (STScI/AURA)说明: 老鹰星云的众多尘埃雕塑正在蒸发之中。随着强烈星光慢慢削去冰冷的宇宙山峰,让这些残存的雕像般云气柱,看来像是神话中的珍禽异兽。上面这幅影像,呈现了老鹰星云数根精采的尘埃柱之一,因为它看似一尊巨大的外星仙女。只不过,这位仙女的身高足有10光年,而且会喷出比人间凡火温度高非常多的辐射。整个老鹰星云 (M16),事实上是一个庞大且在蒸发之中的云气和尘埃壳,内部藏着一个不断成长的空穴,空穴内有正在形成疏散星团的庞大恒星诞生区。这根距离我们约7,000光年远的庞大云柱,则可能会在100,000年左右蒸发殆尽。这张由哈伯太空望远所拍摄的主题影像,其色泽根据科学内涵重新置换过。{lamp/}原文:{mtitle title="The Fairy of Eagle Nebula"/}Image Credit: Image Credit: NASA, ESA, The Hubble Heritage Team (STScI/AURA)Explanation: The dust sculptures of the Eagle Nebula are evaporating. As powerful starlight whittles away thesecool cosmic mountains, thestatuesque pillars that remainmight be imagined as mythical beasts. Featured here is one of several strikingdust pillars of theEagle Nebulathat might be described as a gigantic alienfairy. This fairy, however, is tenlight years tall and spews radiation much hotter thancommon fire.The greater Eagle Nebula, M16,is actually a giant evaporating shell of gas anddust inside of which is a growingcavity filled with a spectacular stellar nursery currently forming anopen cluster of stars. This great pillar, which is about 7,000 light years away, will likely evaporate away in about 100,000 years. The featured image is in scientifically re-assigned colors andwas taken by the Earth-orbiting Hubble Space Telescope.
2022年09月25日
0 阅读
0 评论
0 点赞
1
2
...
31