2022年03月12日:雷耶斯角上空的银河-（Point Reyes Milky Way） 2022年03月12日:雷耶斯角上空的银河-（Point Reyes Milky Way）--原图下载{mtitle title="雷耶斯角上空的银河"/}Image Credit &Copyright:Dan Zafra说明: 在这片从地球加州海岸的雷耶斯角看向太平洋的夜空景观中，北天冬季星座和银河系的长长盘弧落向太平洋。大犬座最明亮的天狼星，是在银河恒星拱下方很吸睛的天体。猎户座泛黄的参宿四．金牛座的毕宿五．及泛蓝的昴宿星团 ，也出现在银河及西北地平线之间，靠近影像的中心附近。用于构建这张全景图的多张照星云照片，则是在今年3 月初所拍摄的；这些星云都是极为昏暗，肉眼不得见的天体。在那个北半球的夜晚， 出现在天空中、幅员广阔的辉光天体，还包括猎户座里半圆形的泛红巴纳德环、以及昴 宿星团右上方、亦称为加州星云的NGC 1499。{lamp/}原文：{mtitle title="Point Reyes Milky Way"/}Image Credit &Copyright:Dan ZafraExplanation: Northern winterconstellations and a long arc of the Milky Wayare setting in this night skyscape looking toward the Pacific Ocean fromPoint Reyes onplanet Earth'sCalifornia coast.Sirius, alpha star of Canis Major, is prominent below the starry arctoward the left.Orion's yellowishBetelgeuse, Aldebaran in Taurus, and the blue tintedPleiades star clusteralso find themselves betweenMilky Way and northwestern horizon near the center of the scene.The nebulae visible in the series of exposures used to constructthis panoramic view were captured in early March,but are just too faint to be seen with the unaided eye.On that northern night theirexpansive glow includesthe reddish semi-circle of Barnard's Loopin Orion andNGC 1499 above and right of the Pleiades, also known as theCalifornia Nebula.

2022年03月07日:猎户座的狮子-（A Lion in Orion） 2022年03月07日:猎户座的狮子-（A Lion in Orion）--原图下载{mtitle title="猎户座的狮子"/}Image Credit & Copyright: Maroun Mahfoud说明: 你看到狮子吗？在这幅深空影像里，中左下方有形似马头的暗斑，而毫不意外的，它就是着名的马头星云。马头星云（巴纳德33），本身是由黝黑不透光尘埃及明亮气体汇集成的庞大複合体之一部分。为了突显马头星云附近区域的细微结构，一位具有艺术素养的天文摄影者，整合了总曝光时间超过20小时的氢（橙）、氧（蓝）及硫（绿）辐射波段之影像。这幅摄于黎巴嫩．Raachine的精采影像，极细緻的呈现由恒星风及远古超新星所造就及雕塑出的繁複 丝状云气与尘埃挂毯。除此之外，在这幅主题影像的马头星云上方之大片橙色气体里，经由空想性错视亦可隐约见到一颗狮子头，而马头的左方则有火焰星云。 马头星云位在北天的猎户座方向，离我们约1,500光年远。{lamp/}原文：{mtitle title="A Lion in Orion"/}Image Credit & Copyright: Maroun MahfoudExplanation: Yes, but can you see the lion?A deep exposure shows the famous dark indentation that looks like ahorse's head, visible just left and below center, and known unsurprisingly as the Horsehead Nebula. The Horsehead Nebula (Barnard 33) is part of a vast complex of dark absorbingdust and brightglowing gas. To bring out details of the Horsehead's pasture, an astrophotographer artistically combined light accumulated for over 20 hours in hydrogen (orange), oxygen (blue), and sulfur (green).The resulting spectacular picturecaptured from Raachine,Lebanon,details an intricate tapestry of gaseous wisps and dust-laden filaments that were created andsculpted over eons by stellar winds andancient supernovas. The featured composition brings up another pareidolic animal icon -- that of a lion's head -- in the expansive orange colored gas above the horse's head. The Flame Nebula is visible just to the left of the Horsehead. The Horsehead Nebula lies 1,500 light years distant towards the constellation of Orion.

2022年02月23日:绿堤上空的猎户座-（Orion over Green Bank） [2022年02月23日:绿堤上空的猎户座-（Orion over Green Bank）--原图下载](https://apod.nasa.gov/apod/image/2202/GreenBankOrion_Green_1638.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2202/GreenBankOrion_Green_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2202/GreenBankOrion_Green_960.jpg';){mtitle title="绿堤上空的猎户座"/}Image Credit & Copyright: Dave Green说明: 庞大的绿堤望远镜今晚会发现什么？这幅影像右下角的绿堤望远镜（GBT），是目前世界上最大的全指向单碟面电波望远镜。中央碟面比美式足球场大的绿堤望远镜 ，座落在美国．西维吉尼亚州的丘陵地带。在它周围的电波宁静区里，使用手机、无线电发报器、甚至连微波炉都高度受限。不管是在白天或黑夜，绿堤望远镜皆能探索宇宙，因为在无线电波段，白画的天空也通常是黝黑的。上面这幅摄于今年1月底的主题影像，经过数个月的规划和等待，直到猎户座来到最佳的西落位置。这幅影像组合自一张摄于离绿堤望远镜1公里之处的前景照片，以及在前一晚拍摄的长曝光背景照片。以猎户座的深空照片作为背景算是相当妥贴 ，因为让绿堤望远镜声名大噪的诸多发现之中，就包括绘製猎户分子云複合体内的不寻常磁场。（Robert C. Byrd Green Bank Telescope, Green Bank Telescope, GBT 绿堤望远镜； Barnard’s Loop 巴纳德环； Betelgeuse 参宿四； Bellatrix 参宿五； Lambda Orionis 觜宿一星云； Orion’s Belt 猎户腰带； Orion Nebula 猎户大星云）{lamp/}原文：{mtitle title="Orion over Green Bank"/}Image Credit & Copyright: Dave GreenExplanation: What will the huge Green Bank Telescope discover tonight?Pictured, the Robert C. Byrd Green Bank Telescope (GBT) on the lower right is the largest fully-pointable single-dish radio telescope in the world.With a central dish larger than a football field, the GBT is nestled in the hills of West Virginia, USA in a radio quiet zone where the use of cell phones, WiFi emitters, and even microwave ovens are limited.The GBT explores our universe not only during the night -- but during the day, too, since the daytime sky is typically dark in radio waves. Taken in late January, the featured image was planned for months to get the setting location of Orion just right. The image is a composite of a foreground shot taken over a kilometer away from the GBT, and a background shot built up of long exposures during the previous night.The deep background image of Orion is fitting because the GBT is famous for, among many discoveries, mapping the unusual magnetic field in the Orion Molecular Cloud Complex.

2022年02月08日:挪威上空的极光和光柱-（Aurora and Light Pillars over Norway） 2022年02月08日:挪威上空的极光和光柱-（Aurora and Light Pillars over Norway）--原图下载{mtitle title="挪威上空的极光和光柱"/}Image Credit & Copyright: Alexandre Correia说明: 你偏爱那一半的天空呢？左半的天空，有来自太阳的高能粒子撞击地球的高层大气后，所产生的明亮极光。右半的天空，有数以百万计飘落的微小冰晶反射地面的灯光，所形成的明亮光柱。而位在影像中央的天文摄影者，则呈现你可做的抉择。右侧的光柱 之所以是垂直的柱状结构，源自缓缓飘落冰晶的扁平面大多与地面平行，因此忠实反射地面灯火的炫光与色泽。而覆天盖地的明亮极光，其泛绿的色泽来自原子氢的辐射，同时也具有颇高的透明度，因为极光后方的恒星清楚可辨。在散布于背景各处的遥远恒星之中，包括猎户座标誌性的亮星。这幅单曝光主题影像，是在2个月前摄于挪威．凯于图凯努镇的近郊。{lamp/}原文：{mtitle title="Aurora and Light Pillars over Norway"/}Image Credit & Copyright: Alexandre CorreiaExplanation: Which half of this sky is your favorite?On the left, the night sky is lit up by particles expelled from the Sun that later collided with Earth's upper atmosphere — creating bright auroras. On the right, the night glows with ground lights reflected by millions of tiny ice crystals falling from the sky — creating light pillars. And in the center, the astrophotographer presents your choices.The light pillars are vertical columns because the fluttering ice-crystals are mostly flat to the ground, and their colors are those of the ground lights.The auroras cover the sky and ground in the green hue of glowing oxygen, while their transparency is clear because you can see stars right through them.Distant stars dot the background, including bright stars from the iconic constellation of Orion. The featured image was captured in a single exposure two months ago near Kautokeino, Norway.

2022年01月18日:从猎户座到南十字-（From Orion to the Southern Cross） [2022年01月18日:从猎户座到南十字-（From Orion to the Southern Cross）--原图下载](https://apod.nasa.gov/apod/image/2201/OrionCross_LucyH_7441.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2201/OrionCross_LucyH_1080_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2201/OrionCross_LucyH_1080.jpg';){mtitle title="从猎户座到南十字"/}Image Credit & Copyright: Lucy Yunxi Hu说明: 这片星空到处都是明亮的标誌性天体。在这张主题影像里，左缘附近有熟悉的猎户座，横亘在腰部排列成行的腰带三星为其标誌天体，其内更有着名的猎户大星云，而二者皆在巴纳德环之内。贴在影像中心左侧的天体，为地球夜空最明亮的天狼星。横贯过影像中心的拱弧，则是我们银河系的中央盘面。影像右上角有银河系最明亮的伴星系：大麦哲伦星系（LMC）及小麦哲伦星系（SMC）。此外，在影像右缘地平线的云层上方，还可见到拥有由4颗恒星组成的南十字标誌之十字架座。这幅主题影像，组合自同一部相机在澳洲相同地点于去年最后数天拍摄的18张照片。前景是邦博岬採石场，从其美丽的花岗岩柱之缝隙里，可以一窥浩瀚的太平洋。{lamp/}原文：{mtitle title="From Orion to the Southern Cross"/}Image Credit & Copyright: Lucy Yunxi HuExplanation: This is a sky filled with glowing icons.On the far left is the familiar constellation of Orion, divided by its iconic three-aligned belt stars and featuring the famous Orion Nebula, both partly encircled by Barnard's Loop.Just left of center in the featured image is the brightest star in the night: Sirius.Arching across the image center is the central band of our Milky Way Galaxy.On the far right, near the top, are the two brightest satellite galaxies of the Milky Way: the Large Magellanic Cloud (LMC), and the Small Magellanic Cloud (SMC).Also on the far right -- just above the cloudy horizon -- is the constellation of Crux, complete with the four stars that make the iconic Southern Cross.The featured image is a composite of 18 consecutive exposures taken by the same camera and from the same location in eastern Australia during the last days of last year. In the foreground, picturesque basalt columns of the Bombo Quarry part to reveal the vast Pacific Ocean.

2022年01月11日:猎户腰带区的气体和尘埃-（Orion's Belt Region in Gas and Dust） [2022年01月11日:猎户腰带区的气体和尘埃-（Orion's Belt Region in Gas and Dust）--原图下载](https://apod.nasa.gov/apod/image/2201/OrionStarFree3_Harbison_5000.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2201/OrionStarFree3_Harbison_1080_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2201/OrionStarFree3_Harbison_1080.jpg';){mtitle title="猎户腰带区的气体和尘埃"/}Image Credit & Copyright: Matt Harbison(Space4Everybody),Marathon Remote Imaging Observatory说明: 你或许看过猎户腰带，但绝非是这种样貌。在这幅影像里，组成猎户座 腰带的三颗亮星，从左到右分别是参宿三、参宿二和参宿一。视野里的其他恒星，已用数位技术加以移除，以突显此区域明亮的气体云和黝黑的尘埃云。在诸多的星云之中，形状较有趣的有位在参宿一右方及右下方的马头星云和火焰星云。这张跨幅5度的深空影像，是在上个月使用20小时的曝光时间摄于美国．德州．马拉松的马拉松暗空公园与天文台；影像后来经过数位处理，以模拟此区如果离我们非常近，我们应能见到的云气和尘埃。此外，着名的猎户大星云位在这片色彩缤纷星野的右上角外头。猎户座约1,500光年远、幅员辽阔的云气和尘埃区，是现知最邻近研究最透澈的恒星形成区。{lamp/}原文：{mtitle title="Orion's Belt Region in Gas and Dust"/}Image Credit & Copyright: Matt Harbison(Space4Everybody),Marathon Remote Imaging ObservatoryExplanation: You may have seen Orion's belt before -- but not like this.The three bright stars across this image are, from left to right, Mintaka, Alnilam, and Alnitak: the iconic belt stars of Orion.The rest of the stars in the frame have been digitally removed to highlight the surrounding clouds of glowing gas and dark dust.Some of these clouds have intriguing shapes, including the Horsehead and Flame Nebulas, both near Alnitak on the lower right. This deep image, taken last month from the Marathon Skypark and Observatory inMarathon, Texas, USA, spans about 5 degrees, required about 20 hours of exposure, and was processed to reveal the gas and dust that we would really see if we were much closer.The famous Orion Nebula is off to the upper right of this colorful field. The entire region lies only about 1,500 light-years distant and so is one of the closest and best studied star formation nurseries known.