2024年08月27日:月掩土星-（Moon Eclipses Saturn） 2024年08月27日:月掩土星-（Moon Eclipses Saturn）--原图下载{mtitle title="月掩土星"/}Image Credit & Copyright: Pau Montplet Sanz说明: 土星会不会突然消失？有时还真的会。不过，它并不是真的消失了，只是我们的月球通过它的前方，让它消失在我们的视线里。这样的土星食，正式的名称是掩星，而就在几天前，从秘鲁横过大西洋到义大利的地球长条区域，都见到了这个月掩土星事件。这张彩色的主题影像，数位融合了数张记录此事件的最清晰照片，并针对相对昏暗的土星和相对明亮的月球，进行了色彩和亮度的调整。这些呈现掩星即将发生前景观的照片，都是摄于西班牙的布瑞达村。今年接下来到年底的这些月份，都会发生月掩土星。只不过，这些稍纵即逝的事件，只有位于地球适当地点和有清朗天空的人们才得见。{lamp/}原文：{mtitle title="Moon Eclipses Saturn"/}Image Credit & Copyright: Pau Montplet SanzExplanation: What if Saturn disappeared? Sometimes, it does. It doesn't really go away, though, it just disappears from view when our Moon moves in front. Such a Saturnian eclipse, more formally called an occultation, was visible along a long swath of Earth -- from Peru, across the Atlantic Ocean, to Italy -- only a few days ago. The featured color image is a digital fusion of the clearest images captured during the event and rebalanced for color and relative brightness betweenthe relatively dim Saturn and the comparatively bright Moon.Saturn and the comparative bright Moon. The exposures were all taken from Breda, Catalonia, Spain, just before occultation.Eclipses of Saturn by our Moon will occur each month for the rest of this year.Each time, though, the fleeting event will be visible only to those with clear skies -- and the rightlocation on Earth.

2024年03月24日:日全食时的地球-（Looking Back at an Eclipsed Earth） 2024年03月24日:日全食时的地球-（Looking Back at an Eclipsed Earth）--原图下载{mtitle title="日全食时的地球"/}Image Credit: Mir 27 Crew; Copyright: CNES说明: 这是日食期间的地球景观。月球的暗影会使部份地球表面变暗，而月影以每小时接近2000公里的速度，扫过 地球。只有在圆形暗影中心附近的观察者，才能看到日全食，其他区域的人，则看见了部分太阳被月亮遮住的日偏食。这张精彩的照片摄于1999年8月11日，时值日食发生之时，而它是和平号太空站拍摄的最末批照片之一。影像左上角的二个亮点，咸认为是木星与土星。这座太空站于2001年接到脱离轨道、受控重返地球大气的指令。再过大约2星期，北美洲可见到另一例新日食。{lamp/}原文：{mtitle title="Looking Back at an Eclipsed Earth"/}Image Credit: Mir 27 Crew; Copyright: CNESExplanation: Here is what the Earth looks like during asolar eclipse.Theshadowof theMoon can be seen darkening part ofEarth.This shadow movedacross theEarth at nearly 2000 kilometers per hour.Only observers near the center of thedark circle see a total solar eclipse -others see a partial eclipse where only part of theSun appears blocked by the Moon.This spectacular picture of the 1999 August 11solar eclipsewas one of the last evertaken from the Mir space station.The two bright spots that appear on the upper left are thought to beJupiter and Saturn.Mir was deorbited in acontrolled re-entry in 2001.A new solar eclipse will occur over North America in about two weeks.

2024年01月31日:相机镜头里的猎户座升起-（Camera Orion Rising） 2024年01月31日:相机镜头里的猎户座升起-（Camera Orion Rising）--原图下载{mtitle title="相机镜头里的猎户座升起"/}Image Credit & Copyright: Marcin Ślipko说明: 在相机的镜头里，猎户座升起的景观何似？每年的这段期间，于刚日落后的东南天空中，即可见到这个着名的星座。而从地球上的大部分地区看出去，以腰带三星为吸睛焦点的猎户座则是侧着升起。于这幅影像里，包括猎户座在内的这片夜空，拍摄时悬在波兰与捷克交界处的Śnieżka 山之后方。这幅长曝光的序列影像，呈现许多昏暗的天体，包括猎户大星云和火焰星云，而二者都在圆弧状的巴纳德环之怀抱里。这幅来自广角相机的主题组合影像，记录了许多夜空的标誌性星体，包括位于影像顶端的泛蓝昴宿星团和猎户座左方的泛红蔷薇星云。视野里的着名恒星，则有天狼星、参宿四、参宿七和毕宿五。在未来几个月里，猎户座将在日落时出现在天空愈来愈高的位置。{lamp/}原文：{mtitle title="Camera Orion Rising"/}Image Credit & Copyright: Marcin ŚlipkoExplanation: What does Orion rising look like to a camera?During this time of the year, the famous constellation is visible to the southeast just after sunset.From most Earthly locations, Orion's familiar star pattern, highlighted by the three-stars-in-a-row belt stars, rises sideways.An entire section of the night sky that includes Orion was photographed rising above Śnieżka, a mountain on the border between Poland and the Czech Republic. The long duration exposure sequence brings up many faint features including the Orion and Flame Nebulas, both encompassed by the curving Barnard's Loop.The featured wide-angle camera composite also captured night sky icons including the blue Pleiades star cluster at the image top and the red Rosette Nebula to the left of Orion.Famous stars in the frame include Sirius, Betelgeuse, Rigel and Aldebaran.Orion will appear successively higher in the sky at sunset during the coming months.

2024年01月25日:天空中的于韦斯屈莱市-（Jyväskylä in the Sky） 2024年01月25日:天空中的于韦斯屈莱市-（Jyväskylä in the Sky）--原图下载{mtitle title="天空中的于韦斯屈莱市"/}Image Credit &Copyright: Harri Kiiskinen说明: 你可能无法一眼认出这是地球芬兰于韦斯屈莱市（Jyväskylä）的街区地图。不过，这或许是因为此图是在1月16日投射到夜空中，然后由全天相机所拍摄的。拍照时的当地冬夜气温，在摄氏零下20度左右。当冰晶在上方的大气中形成后，洒向头顶天空的街灯之灯光，产生了清楚可见的光柱，而其空灵的外观，则源自飘落的扁平冰晶所造成的镜面反射。路灯所投射的光柱，绘出了当地灯火通明的街道之地图，不过在仰望的相机视角里，景观的左右互换。这幅由光柱所构成的街道图，在于韦斯屈莱市的夜空中飘浮了数小时之久。{lamp/}原文：{mtitle title="Jyväskylä in the Sky"/}Image Credit &Copyright: Harri KiiskinenExplanation: You might not immediately recognize this street map ofaneighborhood in Jyväskylä, Finland,planet Earth.But that's probably because the map was projected into the night sky andcaptured with an allsky camera on January 16.The temperature recorded on that northern winter nightwas around minus 20 degrees Celsius.As ice crystals formed in the atmosphere overhead,street lights spilling illumination into the sky above producedvisible light pillars,their ethereal appearance due tospecular reflectionsfrom the fluttering crystals' flat surfaces.Of course, the projected light pillars trace a map of thebrightly lit local streets, thoughreversedright to left in the upward looking camera's view.This light pillar street map was seen to hover for hours inthe Jyväskylä night.

2024年01月24日:远处所见的地球与月亮-（Earth and Moon from Beyond） 2024年01月24日:远处所见的地球与月亮-（Earth and Moon from Beyond）--原图下载{mtitle title="远处所见的地球与月亮"/}Image Credit: NASA, Artemis I;Processing: Andy Saunders说明: 从月亮的后方看过来，地球和月亮会是何种样貌？虽然它们经常 一起 入镜，但是在2022年底，美国航太总署 阿提米丝1号任务的猎户号太空船，旋绕到这颗地球最大卫星的后方，然后回首眺望它的故乡地球，并拍下了这对天体的不寻常视角影像。由于地球的直径大约是月球直径的4倍，是以月亮看似较大，则是因为太空船较靠近它所致。阿提米丝2号是美国航太总署阿提米丝计画的第二项任务，目前规划在2025年把人类送到月球附近，接续的阿提米丝3号任务，将于2026年底把人类送回月球表面。在上星期，来自日本JAXA（日本宇航机构）的小型无人探测器 SLIM降落在月球上，并布署了两部跳跃式的月面车。（Artemis mission 阿提米丝任务）{lamp/}原文：{mtitle title="Earth and Moon from Beyond"/}Image Credit: NASA, Artemis I;Processing: Andy SaundersExplanation: What do the Earth and Moon look like from beyond the Moon?Although frequently photographed together, the familiar duo was captured with this unusual perspective in late 2022 by the robotic Orion spacecraft of NASA's Artemis I mission as it looped around Earth's most massive satellite and looked back toward its home world.Since our Earth is about four times the diameter of the Moon, the satellite’s seemingly large size was caused by the capsule being closer to the smaller body.Artemis II, the next launch in NASA’s Artemis series, is currently scheduled to take people around the Moon in 2025, while Artemis III is planned to return humans to lunar surface in late 2026.Last week, JAXA's robotic SLIM spacecraft, launched from Japan, landed on the Moon and released two hopping rovers.

2024年01月22日:山与月的影子-（Shadows of Mountain and Moon） 2024年01月22日:山与月的影子-（Shadows of Mountain and Moon）--原图下载{mtitle title="山与月的影子"/}Image Credit & Copyright: Enzo Massa Micon说明: 月亮和山会投下类似的影子吗？会的，但它们的明暗界线并不一定要对齐。上图所呈现的为2022年10月初，悬在义大利 格里沃拉山上空的上弦月。在这幅优美的主题影像里，位于右方的太阳，同时照亮了月亮及山峰的右侧。这种月相之所以有“上弦”之称，则是因为从地球看出去，被阳光照亮的月面之可见比例为4分之1。而所拍下的单曝光影像，更经过后置处理以突显影像中的这2个巨大物体。由于每天地球自转一圈，因此要拍下上弦月的明暗界线和笔直山脊几乎对齐的画面，拍照的时间点必需抓得很精准。{lamp/}原文：{mtitle title="Shadows of Mountain and Moon"/}Image Credit & Copyright: Enzo Massa MiconExplanation: Can the Moon and a mountain really cast similar shadows?Yes, but the division between light and dark does not have to be aligned.Pictured, a quarter moon was captured above the mountain Grivola in Italy in early October of 2022. The Sun is to the right of the featured picturesque landscape, illuminating the right side of the Moon in a similar way that it illuminates the right side of the mountain.This lunar phase is called "quarter",in part, because the lit fraction visible from Earth is one quarter of the entire lunar surface. Digital post-processing of this single exposure gave both gigantic objects more prominence.Capturing the terminator of this quarter moon in close alignment with nearly vertical mountain ridge required careful timing because the Earth rotates once a day.