2023年11月19日:太空站、日珥与太阳-（Space Station, Solar Prominences, Sun） 2023年11月19日:太空站、日珥与太阳-（Space Station, Solar Prominences, Sun）--原图下载{mtitle title="太空站、日珥与太阳"/}Image Credit & Copyright: Mehmet Ergün说明: 那不是太阳黑子，而是凌越太阳的国际太空站（ISS）。因为，太阳黑子有黝黑的中心本影，周围环拱着较淡的半影，而且不会有锚泊在旁的飞龙号模组舱。此外，ISS有槎枒的多重结构，是人类至今建造过最大最複杂的太空船。还有，太阳黑子旋绕太阳，国际太空站则绕行地球。国际太空站每90分钟绕行地球一圈，所以太空站凌日是相对常见的景观，不过要精确掌握它凌日的位置和时机，并用适当的设备拍下精采的影像则相对罕见。这幅主题影像，整合了3张摄于相同地点和取像时间几乎相同的照片。其中一张过曝，以记录太阳盘面上缘的昏暗日珥。另一张曝光不足，以拍下太阳色球层複杂的纹理。最后一张照片的难度最高，必须在国际太空站掠过日盘的瞬间捕捉到它的身影。如仔细检视国际太空站的剪影，甚至可发现停泊在该处的飞龙号载人模组舱。{lamp/}原文：{mtitle title="Space Station, Solar Prominences, Sun"/}Image Credit & Copyright: Mehmet ErgünExplanation: That's no sunspot.It's the International Space Station (ISS) caught passing in front of the Sun.Sunspots, individually, have a dark central umbra, a lighter surrounding penumbra, and no Dragon capsules attached. By contrast, the ISS is a complex and multi-spired mechanism, one of the largest and most complicated spacecraft ever created by humanity. Also, sunspots circle the Sun, whereas the ISS orbits the Earth. Transiting the Sun is not very unusual for the ISS, which orbits the Earth about every 90 minutes, but getting one's location, timing and equipment just right for a great image is rare. The featured picture combined three images all taken in 2021 from the same location and at nearly the same time.One image -- overexposed -- captured the faint prominences seen across the top of the Sun, a second image -- underexposed -- captured the complex texture of the Sun's chromosphere, while the third image -- the hardest to get -- captured the space station as it shot across the Sun in a fraction of a second. Close inspection of the space station's silhouette even reveals a docked Dragon Crew capsule.

2023年06月12日:地球最大的卫星-（The Largest Satellites of Earth） 2023年06月12日:地球最大的卫星-（The Largest Satellites of Earth）--原图下载{mtitle title="地球最大的卫星"/}Image Credit & Copyright: Tianyao Yang说明: 在月亮附近的是什么？是国际太空站（ISS）。虽然国际太空站或许看起来就在月亮附近，但事实并非如此，它在空间上较靠近地球。位在低地球轨道上、大约每90分钟绕行蔚蓝地球一圈的国际太空站，拍照时只是恰好通过月亮前方。影像所示的月亮，在绕行地球为期长达一个月的周期轨道上，恰好处在新月阶段，因为从地球看出去只能见到受阳光照耀半面的一弧银白。这幅在今年3月下旬摄于中国．上海的主题影像，除了呈现了地球最大的人造卫星之细部结构，更显示了地球最大天然卫星的撞击坑及贫瘠表面之细节。在接下来的数年里，人类规划把比先前还多的人和机器送上月球。{lamp/}原文：{mtitle title="The Largest Satellites of Earth"/}Image Credit & Copyright: Tianyao YangExplanation: What’s that near the Moon?It’s the International Space Station (ISS).Although the ISS may appear to be physically near the Moon, it is not — it is physically near the Earth.In low Earth orbit and circulating around our big blue marble about every 90 minutes, the ISS was captured photographically as it crossed nearly in front of the Moon.The Moon, itself in a month-long orbit around the Earth, shows a crescent phase as only a curving sliver of its Sun-illuminated half is visible from the Earth.The featured image was taken in late March from Shanghai, China and shows not only details of Earth's largest human-made satellite, but details of the cratered and barren surface of Earth's largest natural satellite.Over the next few years, humanity is planning to send more people and machines to the Moon than ever before.

2023年01月07日:低地球轨道上的太空站-（Space Stations in Low Earth Orbit） 2023年01月07日:低地球轨道上的太空站-（Space Stations in Low Earth Orbit）--原图下载{mtitle title="低地球轨道上的太空站"/}Image Credit &Copyright: Zarcos Palma说明: 1月3日在黎明前幽暗的天空中，有2座位于低地球轨道上，受到阳光照耀的太空站飞掠而过。在这幅缩时组合影像里，中国的天宫太空站从西向东飞（左到右），在日出前1个多小时的这片夜空中曳出上方的迹线。在背景点点繁星的衬托下，于迹线的最高点时，天宫号从倒悬的着名的大熊座星官北斗七星下方及北极星的上方通过。而在稍早的5多分钟前，国际太空站在幽暗的天空中曳出自己的日曜迹线。其迹线，起始于悬在北方地平线附近的仙后座的明亮W形恒星群之上方。这幅影像戏剧性的前景，是位于葡萄牙东南部Achada do Gamo区的一座废弃矿井。{lamp/}原文：{mtitle title="Space Stations in Low Earth Orbit"/}Image Credit &Copyright: Zarcos PalmaExplanation: On January 3, two space stationsalready illuminated by sunlight in low Earth orbitcrossed this dark predawn sky.Moving west to east (left to right) across the compositedtimelapse imageChina's Tiangong Space Stationtraced the upper trail capturedmore than an hour before the local sunrise.Seen against a starry backgroundTiangong passes just belowthe inverted Big Dipper asterism of Ursa Majornear the peak of its bright arc,and above north pole star Polaris.But less than five minutes before, theInternational Space Stationhad traced its own sunlit streak across the dark sky.Its trail beginsjust above the W-shape outlined by the brightstars of Cassiopeia near the northern horizon.The dramatic foreground spans an abandoned mine at Achada do Gamoin southeastern Portugal.

2022年09月03日:太阳、月亮与国际太空站-（Sun and Moon and ISS） 2022年09月03日:太阳、月亮与国际太空站-（Sun and Moon and ISS）--原图下载{mtitle title="太阳、月亮与国际太空站"/}Image Credit &Copyright: Wang Letian (Eyes at Night),Jin Ma (Beijing Planetarium)说明: 8月25日的白昼天空中，同时可以见到太阳和月亮，而国际太空站也显露了身影。在当地时间上午11:02左右，从中国．北京市．顺义区看出去，见到了国际太空站凌越残月的月盘。而在西南方约40公里外的丰台区，仅在29秒之后，就见到了国际太空站凌越日盘。这两幅建构自摄于此二处并经过处理及叠加的影片定格之图板，就比较了这二个凌越事件。这个协同摄影工作使用了不同的摄影设备，不过后来经过调整，以相同的比例呈现太阳和月亮。凌月发生之时，根据计算国际太空站的距离为435公里，而凌日时，太空站的距离则为491公里。{lamp/}原文：{mtitle title="Sun and Moon and ISS"/}Image Credit &Copyright: Wang Letian (Eyes at Night),Jin Ma (Beijing Planetarium)Explanation: On August 25 Sun and Moon could both be seen in planet Earth's daytimeskies.And so could theInternational Space Station.The ISS crossed the disk of the waning crescent Moon as seenfrom Shunyi district, Beijing, China at about 11:02 am local time.Some 40 kilometers to the southwest, in Fengtai district,the ISS was seen to cross the Sun's disk too.The solar transit was observed only 29 seconds later.Both transits are compared in these panels, composed of processedand stacked video frames from the two locations.The coordinated captures were made with different equipment,but adjusted to show the Sun and Moon at the same scale.The ISS was at a calculated range of 435 kilometers for thelunar transitand 491 kilometers when passing in frontof the Sun.

2022年07月09日:土星与国际太空站-（Saturn and the ISS） 2022年07月09日:土星与国际太空站-（Saturn and the ISS）--原图下载{mtitle title="土星与国际太空站"/}Image Credit &Copyright: Tom Glenn说明: 高悬在地球天空中的明亮土星，是6月清晨行星大游行的明星。但在6月24日极短暂的期间，它有低地球轨道上的明亮物体（国际太空站）为伴。在那天摄于加州．特曼库拉市一所学校的停车场的这幅高速摄影机影片定格里，这颗环系行星和国际太空站同时入镜。当时土星的亮度是+0.5等，太空站则是更明亮的-3等，而这张定格影像却能忠实的呈现它的亮度差异。在这张高难度的影像里，轨道上的国际太空站距离为602公里，土星则距离这座学校停车场约14亿公里远。{lamp/}原文：{mtitle title="Saturn and the ISS"/}Image Credit &Copyright: Tom GlennExplanation: Soaring high in skies around planet Earth, bright planetSaturn was a star of June's morning planet parade.But very briefly on June 24 it posed with a bright object inlow Earth orbit, the International Space Station.On that date from a school parking lot inTemecula, California the ringed-planet andInternational Space Stationwere both caught in this singlehigh-speed video frame.Though Saturn was shining at +0.5 stellar magnitudethe space station was an even brighter -3on the magnitude scale.That difference in brightness is faithfully representedin the video capture frame.In the challenging image, the orbiting ISS was at a range of 602 kilometers.Saturn was about 1.4 billion kilometers from theschool parking lot.

2022年04月17日:地球上方的太空梭-（Shuttle Over Earth） [2022年04月17日:地球上方的太空梭-（Shuttle Over Earth）--原图下载](https://apod.nasa.gov/apod/image/2204/shuttleAtm_nasa_6048.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2204/shuttleAtm_nasa_960_ann.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2204/shuttleAtm_nasa_960.jpg';){mtitle title="地球上方的太空梭"/}Image Credit: NASA, Expedition 22 Crew说明: 在靠近我们的是什么？于2010 年，国际太空站的太空人在远处看见它。然后很快的，它就变大为暗色的剪影。随着它愈来愈近，这个剪影看来彷彿是一艘太空船。最后，这个物体成为奋进号太空梭，并如预期的很快停泊在地球轨道太空站之旁。而在这幅奋进号接近地球地平线时所拍摄的主题影像里，可见看到地球大气层的数个分层。在太空梭正后方是泛蓝的中气层。白色的是平流层，而橙色的则是地球的对流层。这些薄薄的大气分层之总厚度，虽然不到地球半径的百分之二，但在多个面向养护着我们，包括提供呼吸所需的氧气和阻挡来自太空的危险辐射。（mesosphere 中气层； stratosphere 平流层；troposphere 对流层）{lamp/}原文：{mtitle title="Shuttle Over Earth"/}Image Credit: NASA, Expedition 22 CrewExplanation: What's that approaching?Astronauts on board theInternational Space Station in 2010 first saw it far in the distance. Soon it enlarged to become adark silhouette.As it came even closer, thesilhouette appeared to be a spaceship.Finally, the object revealed itself to be theSpace Shuttle Endeavour, and it soon docked as expected with theEarth-orbiting space station. Pictured here, Endeavour was imaged near Earth's horizon as it approached, where several layers of theEarth's atmosphere were visible.Directly behind the shuttle is themesosphere, which appears blue. The atmospheric layer that appears white is thestratosphere,while the orange layer is Earth'sTroposphere.Together, these thin layers of air -- collectively spanning less than 2 percent of Earth's radius -- sustain us all in many ways, including providing oxygen to breath and a barrier to dangerous radiations from space.