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2021年09月08日:仙女大星系方向的深空影像-(The Deep Sky Toward Andromeda)
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欢迎来到人生天地间
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2017年11月29日:M42:猎户座大星云-(M42: The Great Orion Nebula)
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2017年08月06日:银河与炸裂的流星-(Milky Way and Exploding Meteor)
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2024年02月11日:直指月亮的火箭烟尘影子-(Rocket Plume Shadow Points to the Moon)
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2024-01-24
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24日
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2024-01-02
2024年01月02日:火箭凌越波纹月-(Rocket Transits Rippling Moon)
2024年01月02日:火箭凌越波纹月-(Rocket Transits Rippling Moon)--原图下载{mtitle title="火箭凌越波纹月"/}Image Credit & Copyright: Steven Madow说明: 火箭能让月球产生涟漪吗?不能,但它可以让背景的月亮看似带着波纹。在此例里,这枚于上星期从美国航太总署 甘迺迪太空中心发射升空的火箭,是太空探险公司的猎鹰号重载火箭。在这幅记录其发射景观的主题影像里,火箭的明亮排气羽流之伸展範围,覆盖并超出远后方接近满相的东升明月。很奇特的是,月盘的下缘带着不寻常的滴水状波纹。其实,远方的月亮本身并没有任何改变。这些视觉上的波纹之物理成因,是相对较热(较稀薄)的空气胞,对月光的偏折低于相对较冷(较緻密)的空气胞所产生之蜃影。儘管此次拍照是计划好的,但火箭发射的时间点必须恰好,才能让它在拍照期间凌越月亮。{lamp/}原文:{mtitle title="Rocket Transits Rippling Moon"/}Image Credit & Copyright: Steven MadowExplanation: Can a rocket make the Moon ripple?No, but it can make a background moon appear wavy. The rocket, in this case, was a SpaceX Falcon Heavy that blasted off from NASA's Kennedy Space Center last week.In the featured launch picture, the rocket's exhaust plume glows beyond its projection onto the distant, rising, and nearly full moon. Oddly, the Moon's lower edge shows unusual drip-like ripples.The Moon itself, far in the distance, was really unchanged. The physical cause of these apparent ripples was pockets of relatively hot or rarefied air deflecting moonlight less strongly than pockets of relatively cool or compressed air: refraction.Although the shot was planned, the timing of the launch had to be just right for the rocket to be transiting the Moon during this single exposure.
2024年01月02日
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2023-10-23
2023年10月23日:朱诺太空船的木卫一影像-(Moon Io from Spacecraft Juno)
2023年10月23日:朱诺太空船的木卫一影像-(Moon Io from Spacecraft Juno)--原图下载{mtitle title="朱诺太空船的木卫一影像"/}Image Credit: NASA,JPL-Caltech,SwRI,MSSS;Processing & Copyright: Ted Stryk & Fernando García Navarro说明: 再来一幅影像!木星的木卫一表面之火山不断的喷发。为了进行探索,美国航太总署的朱诺号<a/>太空船,针对这颗异常奇特的卫星进行一系列的飞越。大小与地球的月亮相当的木卫一,由于受到木星和其他卫星的重力搓揉,其内部被加热,让它的表面满布着火山。这幅来自朱诺号的主题影像,摄于上星期以12,000公里的间距飞越这颗危险的活跃卫星之时。木卫一的表面覆盖着硫磺和冻结的二氧化硫,让它带着黄色、橙色和棕色等色泽。正如事先所期望的,朱诺号刚好在火山喷发时飞越,因此在主题影像的顶部附近,可见到爆发所产生的暗淡羽状流。研究木卫一的火山和羽状流,对人类深入了解木星複杂的卫星、环系和极光系统是如何进行交互作用有所助益。朱诺号计划在未来的数个月里,进行2次距离近10倍的木卫一飞越,其中一次在今年12月,另一次在2024年2月。{lamp/}原文:{mtitle title="Moon Io from Spacecraft Juno"/}Image Credit: NASA,JPL-Caltech,SwRI,MSSS;Processing & Copyright: Ted Stryk & Fernando García NavarroExplanation: There goes another one! Volcanoes on Jupiter's moon Io keep erupting.To investigate, NASA's robotic Juno<a/> spacecraft has begun a series of visits to this very strange moon.Io is about the size of Earth's moon, but because of gravitational flexing by Jupiter and other moons, Io's interior gets heated and its surface has become covered with volcanoes. The featured image is from last week's flyby, passing within 12,000 kilometers above the dangerously active world.The surface of Io is covered with sulfur and frozen sulfur dioxide, making it appear yellow, orange and brown.As hoped, Juno flew by just as a volcano was erupting -- with its faint plume visible near the top of the featured image. Studying Io's volcanoes and plumes helps humanity better understand how Jupiter's complex system of moons, rings, and auroras interact.Juno is scheduled to make two flybys of Io during the coming months that are almost 10 times closer: one in December and another in February 2024.
2023年10月23日
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2023-08-08
2023年08月08日:月亮与木星-(Moon Meets Jupiter)
[2023年08月08日:月亮与木星-(Moon Meets Jupiter)--原图下载](https://apod.nasa.gov/apod/image/2308/MoonsJupiter_Coy_2630.jpg"onMouseOver="if (document.images)document.imagename1.src='image/2308/MoonsJupiter_Coy_960_annotated.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/2308/MoonsJupiter_Coy_960.jpg';){mtitle title="月亮与木星"/}Credit & Copyright: Jordi L. Coy说明: 月球下方是什么?木星和它的大卫星。地球上的许多观星者,在6月中旬见到了月亮几乎从木星前方通过的近合景观,如这幅摄于西班牙.Morón de la Frontera镇的单曝光主题影像所示。影像里,左侧有受到阳光直射而过度曝光的月牙,而右侧为受到微弱地照光照耀的月球夜面。在月亮的下方,可见到木星和从左到右斜排的明亮伽利略卫星:木卫四、木卫二、木卫一(离木星太近,很难分辨)和木卫三。事实上,木卫四、木卫三和木卫一皆大于月球,只有木卫二略小。目前美国航太总署的朱诺号太空船正在绕行木星,并且刚在1星期前近距离飞越木卫一。如果你今晚 仰望 夜空,将再次见到视角上相邻的这2颗最明亮的天体,因为今晚月亮与木星再次发生近合。{lamp/}原文:{mtitle title="Moon Meets Jupiter"/}Credit & Copyright: Jordi L. CoyExplanation: What's that below the Moon?Jupiter -- and its largest moons. Many skygazers across planet Earth enjoyed the close conjunction of Earth's Moon passing nearly in front of Jupiter in mid-June.The featured image is a single exposure of the event taken from Morón de la Frontera, Spain.The sunlit lunar crescent on the left is overexposed, while the Moon's night side, on the right, is only faintly illuminated by Earthshine.Lined up diagonally below the Moon, left to right, are Jupiter's bright Galilean satellites: Callisto, Ganymede,Io (hard to see as it is very near to Jupiter), and Europa. In fact, Callisto, Ganymede, and Io are larger than Earth's Moon, whileEuropa is only slightly smaller.NASA's robotic spacecraft Juno is currently orbiting Jupiter and made a close pass near Io only a week ago. If you look up in the night sky tonight, you will again see two of the brightest objects angularly close together -- because tonight is another Moon-Jupiter conjunction.
2023年08月08日
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2023-07-11
2023年07月11日:活跃太阳的黑子-(Sunspots on an Active Sun)
2023年07月11日:活跃太阳的黑子-(Sunspots on an Active Sun)--原图下载{mtitle title="活跃太阳的黑子"/}Image Credit: NASA, SDO;Processing & Copyright:Şenol Şanlı说明: 为何太阳目前如此活跃?没人能说个准。随着太阳往2025年的活动极大期靠近,它的表面活动本来就预期会增加。不过,太阳在上个月所产生的黑子数量,比过去整个11年太阳週期中的任何一个月都要多,甚至可一路回溯到2002年。这幅主题影像,是由美国航太总署的太阳动态观测卫星(SDO),于今年1月到6月之间每天拍摄的照片组合而成。影像呈现了大量从左到右旋过日盘的太阳黑子,其中的单颗大型黑子之可追蹤期间大约为2星期。而随着太阳活动週期持续,黑子出现的位置通常愈来愈靠近赤道。太阳黑子只是太阳展现的表面活动之一,其他的还有闪陷(耀斑)及会把粒子喷入太阳系的日冕物质抛射(CME)。由于这些粒子会对太空人及电子设备造成影响,因此监控太阳的表面扰动,不仅是因为它们的美学价值。话说回来,太阳活动倒是可有很高的美学价值,如果它们触发了地球大气中的极光活动。{lamp/}原文:{mtitle title="Sunspots on an Active Sun"/}Image Credit: NASA, SDO;Processing & Copyright:Şenol ŞanlıExplanation: Why is our Sun so active now?No one is sure. An increase in surface activity was expected because our Sun is approaching solar maximum in 2025.However, last month our Sun sprouted more sunspots than in any month during the entire previous 11-year solar cycle -- and even dating back to 2002.The featured picture is a composite of images taken every day from January to June by NASA's Solar Dynamic Observatory. Showing a high abundance of sunspots, large individual spots can be tracked across the Sun's disk, left to right, over about two weeks. As a solar cycle continues, sunspots typically appear closer to the equator. Sunspots are just one way that our Sun displays surface activity -- another is flares and coronal mass ejections (CMEs) that expel particles out into the Solar System.Since these particles can affect astronauts and electronics, tracking surface disturbances is of more than aesthetic value. Conversely, solar activity can have very high aesthetic value -- in the Earth's atmosphere when they trigger aurora.
2023年07月11日
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2023-06-13
2023年06月13日:木卫凌越木星-(Moons Across Jupiter)
2023年06月13日:木卫凌越木星-(Moons Across Jupiter)--原图下载2023 June 13 <iframe width="960" height="960"src="https://www.youtube.com/embed/YEXuGgRCyS0?rel=0"title="YouTube video player"frameborder="0"allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"allowfullscreen>{mtitle title="木卫凌越木星"/}Image Credit: NASA;ESA,JPL,Cassini Imaging Team,SSI; Processing: Kevin M. Gill说明: 木星的卫星绕着木星运行。这部主题影片呈现木卫二和木卫一这两颗木星的大卫星,在这颗行星的大红斑、太阳系里现知最大的风暴系统前方交错的景观。这部影片是由卡西尼号太空船,在2000年路过木星前往土星的途中,所拍下的多幅影像组合而成。影片中所见的两颗卫星,分别是较远处的火山卫星木卫一及冰卫星木卫二。在这部缩时影片里,木卫二似乎追过了木卫一;这是很让人困惑的景观,因为木卫一离木星较近,移动也较快速。这现象的解释是:卡西尼号太空船在高速移动,造成取像时的相机位置出现显着的改变。目前正探索木星的太空船是美国航太总署的朱诺号,而在今年4月发射的欧洲航天局.木星冰卫探测器(JUICE),则在前往木星的途中。{lamp/}原文:{mtitle title="Moons Across Jupiter"/}Image Credit: NASA;ESA,JPL,Cassini Imaging Team,SSI; Processing: Kevin M. GillExplanation: Jupiter's moons circle Jupiter.The featured video depicts Europa and Io, two of Jupiter's largest moons, crossing in front of the grand planet's Great Red Spot, the largest known storm system in our Solar System.The video was composed from images taken by the robotic Cassini spacecraft as it passed Jupiter in 2000, on its way to Saturn.The two moons visible are volcanic Io, in the distance, and icy Europa. In the time-lapse video, Europa appears to overtake Io, which is odd because Io is closer to Jupiter and moves faster.The explanation is that the motion of the fast Cassini spacecraft changes the camera location significantly during imaging. Jupiter is currently being visited by NASA's robotic Juno spacecraft, while ESA's Jupiter Icy Moons Explorer (JUICE), launched in April, is enroute.
2023年06月13日
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