2023年12月13日:深场影像：心脏星云-（Deep Field: The Heart Nebula） 2023年12月13日:深场影像：心脏星云-（Deep Field: The Heart Nebula）--原图下载{mtitle title="深场影像：心脏星云"/}Image Credit & Copyright: William Ostling, Telescope Live说明: 是什么在驱动心脏星云发光呢？ 首先，影像左侧这个编录号为IC 1805的大型发射星云，整体外观形似人的心脏。此星云明亮的泛红辉光，来自其内最主要的元素氢所发出的红光，不过这幅长曝光影像，也记录了源自硅（黄）及氧（蓝）所发出的光。而位在心脏星云中心的疏散星团梅洛特15之年轻成员星，更以恒星风和能激发原子的高能辐射雕蚀出数根很上相的尘埃柱。心脏星云位于仙后 座方向，约7,500光年远之处。此外，心脏星云的右下方有鱼头星云为伴。这张广袤而深邃的影像，明确的显示心脏星云周遭的所有方位，皆包裹着发光的云气。（Melotte 15 梅洛特15）{lamp/}原文：{mtitle title="Deep Field: The Heart Nebula"/}Image Credit & Copyright: William Ostling, Telescope LiveExplanation: What excites the Heart Nebula?First, the large emission nebula on the left, catalogued as IC 1805, looks somewhat like a human heart. The nebula glows brightly in red lightemitted by its most prominent element,hydrogen,but this long-exposure image was also blended with lightemitted by silicon (yellow) and oxygen (blue). In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their atom-exciting energetic light and winds.The Heart Nebula is located about 7,500 light years away toward theconstellation of Cassiopeia. At the bottom right of the Heart Nebula is the companion Fishhead Nebula. This wide and deep image clearly shows, though, that glowing gas surrounds the Heart Nebula in all directions.

2023年07月10日:NGC 6559的恆星、尘埃、与星云-（Stars, Dust and Nebula in NGC 6559） 2023年07月10日:NGC 6559的恆星、尘埃、与星云-（Stars, Dust and Nebula in NGC 6559）--原图下载{mtitle title="NGC 6559的恆星、尘埃、与星云"/}Image Credit & Copyright: Adam Block,Telescope Live说明: 当恒星形成时，喧嚣混乱主宰一切。恒星形成区NGC 6559就是这样的教科书範例之一。在这幅主题影像里，可见到泛红的氢 发射星云、泛蓝的尘埃 反射星云、满是尘埃的暗吸收星云、以及它们所诞生的恒星。而从緻密气体里诞生的第一批大质量恒星，将会发出高能星光和恒星风，侵蚀、碎裂和雕塑诞生它们的育婴室。接着，它们爆发生了爆炸，所产生的大混乱可以是既美丽又複杂。在数千万年后，其内的尘埃被蒸发掉，气体也被吹走，徒留下一个空泛的疏散星团。{lamp/}原文：{mtitle title="Stars, Dust and Nebula in NGC 6559"/}Image Credit & Copyright: Adam Block,Telescope LiveExplanation: When stars form, pandemonium reigns. A textbook case is the star forming regionNGC 6559. Visible in the featured image are red glowingemission nebulas ofhydrogen, bluereflection nebulas ofdust, darkabsorption nebulas of dust, and the stars that formed from them. The first massive starsformed from the dense gas will emitenergetic light andwindsthat erode, fragment, andsculpt their birthplace. And then theyexplode.The resulting morasscan be as beautiful as it is complex. After tens of millions of years, the dust boils away,the gas gets swept away, and all that is left is a bareopen cluster of stars.

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03月01日:御夫AE星和火焰恆星云-（The Flaming Star Nebula） [2023年03月01日:御夫AE星和火焰恆星云-（The Flaming Star Nebula）--原图下载](https://apod.nasa.gov/apod/image/2303/FlamingStarComet_Roell_7504.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2303/FlamingStarComet_Roell_1080_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2303/FlamingStarComet_Roell_1080.jpg';){mtitle title="御夫AE星和火焰恆星云"/}Image Credit & Copyright: Thomas Röell说明: 御夫AE星着火了吗？ 并没有。虽然御夫AE星称为火燄恒星，周围的星云IC 405名为火焰恒星云（Flaming Star Nebula），此区对某些人来说形似涡状火焰，然而此处并没有火。常见的凡火是物质和氧剧烈结合所致，只有在氧够多的环境才会发生，是以在像恒星这种高能低氧的环境里，火无足轻重。位在火焰恒星云中心的明亮御夫AE星极为炽热，故星色泛蓝，而它所发出的辐射能量极高，能把周围物质的电子给撞飞出去。当质子再和电子复合时，就会发光，故其周围环拱着发射星云。在这幅摄于3星期前的组合影像里，中心附近为火焰恒星云，其左有泛红的蝌蚪星云，右侧则有曳着泛蓝彗尾的ZTF彗星。位在北天御夫 座方向的火焰恒星云，离我们约1,500光年远，跨幅约有5光年，用小望远镜即可见。{lamp/}原文：{mtitle title="The Flaming Star Nebula"/}Image Credit & Copyright: Thomas RöellExplanation: Is star AE Aurigae on fire? No. Even though AE Aurigae is named the Flaming Star and the surrounding nebula IC 405 is named the Flaming Star Nebula, and even though the nebula appears to some like a swirlingflame, there is no fire. Fire, typically defined as the rapid molecular acquisition of oxygen, happens only when sufficient oxygen is present and is not important in such high-energy, low-oxygen environments such as stars. The bright star AE Aurigae occurs near the center of the Flaming Star Nebula and is so hot it glows blue, emitting light so energetic it knocks electrons away from surrounding gas.When a proton recaptures an electron, light is emitted, as seen in the surrounding emission nebula. Captured here three weeks ago, the Flaming Star Nebula is visible near the composite image's center, between the red Tadpole Nebula on the leftand blue-tailed Comet ZTF on the right. The Flaming Star Nebula lies about 1,500 light years distant, spans about 5 light years, and is visible with a small telescope toward the constellation of the Charioteer (Auriga).

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06月07日:NGC 6188：天坛座的龙形云气-（NGC 6188: Dragons of Ara） 2022年06月07日:NGC 6188：天坛座的龙形云气-（NGC 6188: Dragons of Ara）--原图下载{mtitle title="NGC 6188：天坛座的龙形云气"/}Image Credit & Copyright: Shaun Robertson说明: 天坛座发生了龙族大战吗？虽然乍看像是如此，但这些“龙”其实是气体和尘埃聚成的幻影 。这些明亮云气所属的发射星云NGC 6188，位在天坛座内一个黝黑庞大分子云的边缘，离我们约有4,000光年远。此星云嵌着刚在数百万年前形成的天坛座OB1星协之大质量年轻恒星，它们所散发的强烈紫外辐射和恒星风，除了雕塑出这些奇形云气之外，也激发星云内的云气发出辉光。这些近期的恒星形成活动，可能由先前世代的大质量恒星之恒星风和超新星爆炸，扫集和压缩分子云气所触发的。在这片宇宙视野里与NGC 6188为伴的，还有右下角较罕见、也是由此区的大质量Ｏ型星所激发出的发射星云NGC 6164。外观和许多行星状星云类似的NGC 6164，其醒目的对称云气包和暗淡的外晕，环拱着位在底缘附近的明亮中心星。 这张视野极为宽广跨幅超过2度（4个满月）的影像，以NGC 6188的距离来换算，大约涵盖150多光年的区域。{lamp/}原文：{mtitle title="NGC 6188: Dragons of Ara"/}Image Credit & Copyright: Shaun RobertsonExplanation: Do dragons fight on the altar of the sky? Although it might appear that way, these dragons are illusions made of thin gas and dust.The emission nebula NGC 6188, home to the glowing clouds, is found about 4,000 light years away near the edge of alarge molecular cloud unseen at visible wavelengths, in the southernconstellationAra (the Altar).Massive, youngstars of the embedded AraOB1 associationwere formed in that region only a few million years ago,sculpting the dark shapes andpowering the nebular glow with stellar winds and intense ultraviolet radiation.The recentstar formation itself was likely triggered bywinds and supernova explosions, from previous generations of massivestars, that swept up and compressed the molecular gas.Joining NGC 6188 on this cosmic canvas, visible toward the lower right, is rare emission nebula NGC 6164,also created by one of the region's massive O-type stars.Similar in appearance to manyplanetary nebulae, NGC 6164's striking,symmetric gaseous shroud and faint halo surround its bright central star near the bottom edge.This impressively wide field of viewspans over 2 degrees (four full Moons), corresponding toover 150 light years at the estimated distanceof NGC 6188.