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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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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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2023-12-11
2023年12月11日:太阳极小期与太阳极大期-(Solar Minimum versus Solar Maximum)
2023年12月11日:太阳极小期与太阳极大期-(Solar Minimum versus Solar Maximum)--原图下载2023 December 11 {mtitle title="太阳极小期与太阳极大期"/}Video Credit: NASA,SDO, SVS说明: 太阳表面不停的在变。它有些年分很宁静,出现相对少量的太阳黑子和活跃区。而在其他的年分,太阳表面会剧烈翻腾,出现大量的太阳黑子,并经常发生日冕物质抛射和日闪(耀斑)。太阳表面因为对磁学性质的改变作出反应,每11年,会经历一次相对平静的太阳极小期及一次相对动荡的极大期。左侧主题影片所呈现的是2019年底的一个月,当时太阳处在极小期附近,右侧则是2014年的一个月,太阳处在极大期附近。这部影片是由美国航太总署的太阳动态观测卫星(SDO)摄于远紫外光 波段。太阳正在向2025年的极大期迈进,不过即使是现在,太阳表面已出现令人惊讶的高活动量。{lamp/}原文:{mtitle title="Solar Minimum versus Solar Maximum"/}Video Credit: NASA,SDO, SVSExplanation: The surface of our Sun is constantly changing. Some years it is quiet, showing relatively few sunspots and active regions.Other years it is churning, showing many sunspots and throwing frequent Coronal Mass Ejections (CMEs) and flares.Reacting to magnetism, our Sun's surface goes through periods of relative calm, called Solar Minimum and relative unrest, called Solar Maximum, every 11 years.The featured video shows on the left a month in late 2019 when the Sun was near Solar Minimum, while on the right a month in 2014 when near Solar Maximum. The video was taken by NASA's Solar Dynamic Observatory in far ultraviolet light.Our Sun is progressing again toward Solar Maximum in 2025, but displaying even now a surface with a surprisingly high amount of activity.
2023年12月11日
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2023-08-24
2023年08月24日:沿银河洒落的流星-(Meteors along the Milky Way)
2023年08月24日:沿银河洒落的流星-(Meteors along the Milky Way)--原图下载{mtitle title="沿银河洒落的流星"/}Image Credit &Copyright: Ali Hosseini Nezhad说明: 今年在几乎无月光干扰的幽暗夜空下,许多地球的住民得以好好观赏年年复现的英仙流星雨。而在8月13日星期日黎明前,从伊朗、设拉子县的山坡草原看出去,这些英仙流星沿着北半球的夏季银河洒向大地。用以构建这幅组合影像的照片,係摄于当地时间清晨02:00至04:30之间,时值今年英仙流星雨的极大期附近。而此流星雨位于英仙座内的辐射点,则座落在远高于这片相机夜空视野的上空。不过,北半球夏夜的粉丝仍可找到熟悉的星群。由天津四、织女和牛郎所构成的夏三角,正好跨坐在明亮的带状银河上。{lamp/}原文:{mtitle title="Meteors along the Milky Way"/}Image Credit &Copyright: Ali Hosseini NezhadExplanation: Under darkand mostly moonless night skies, manydenizens of planet Earthwere able to watch this year's Perseid meteor shower.Seen from a grassy hillside from Shiraz, Iran thesePerseid meteors streakalong the northern summer Milky Waybefore dawn on Sunday, August 13.Frames used to construct the composited imagewere captured near theactive annual meteor shower's peakbetween 02:00 AM and 04:30 AM local time.Not in this night skyscape, the shower's radiant inthe heroic constellation Perseus is far above the camera's fieldof view.But fans of northern summer nightscan still spota familiar asterism.Formed by bright stars Deneb, Vega, and Altair, theSummer Trianglespans the luminous band of the Milky Way.
2023年08月24日
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2022-08-11
2022年08月11日:英仙流星雨与神奇望远镜-(Perseids and MAGIC)
2022年08月11日:英仙流星雨与神奇望远镜-(Perseids and MAGIC)--原图下载{mtitle title="英仙流星雨与神奇望远镜"/}Image Credit &Copyright: Urs Leutenegger说明: 2021年8月11日,隶属于加那利群岛.拉帕尔马岛.欧北天文台.穆查丘斯罗克天文台的多镜片17米口径的神奇望远镜(MAGIC),正在反映这片夜空。MAGIC是大型大气伽马射线成像切伦科夫望远镜的英文简称。当高能伽马射线撞击地球的高层大气时,这座望远镜可以看到粒子空气簇射所产生的短暂闪光。对于适应黑暗后的眼睛来说,分格镜面精采的反映了我们银河系盘面附近的恒星和星云。而在拍照时,这幅迷人的夜空影像,也记录了起源自英仙流星雨辐射点的流星。今年的英仙流星雨的极大期在8月13日左右,不过到时候,英仙流星得与明亮满月的月光争辉。{lamp/}原文:{mtitle title="Perseids and MAGIC"/}Image Credit &Copyright: Urs LeuteneggerExplanation: On August 11, 2021a multi-mirror, 17 meter-diameterMAGIC telescope reflectedthis starry night sky from the Roque de los MuchachosEuropean Northern Observatory on the Canary Island of La Palma.MAGIC stands for Major Atmospheric Gamma Imaging Cherenkov.The telescopes can see the briefflashes of optical light producedin particle air showers as high-energygamma rays impact the Earth's upper atmosphere.To the dark-adapted eye the mirror segments offer a tantalizing reflection of stars and nebulae along the plane of our Milky Way galaxy.But directly behind the segmented mirror telescope, low on the horizon, lies theconstellation Perseus.And on that date the dramatic composite nightscape alsocaptured meteors streamingfrom the radiant of the annualPerseid meteor shower.This year the Perseid showeractivitywill again peakaround August 13 but perseid meteorswill have to compete with the bright light of a Full Moon.
2022年08月11日
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2022-03-22
2022年03月22日:瑞典森林上空的鲸形极光-(A Whale of an Aurora over Swedish Forest)
2022年03月22日:瑞典森林上空的鲸形极光-(A Whale of an Aurora over Swedish Forest)--原图下载{mtitle title="瑞典森林上空的鲸形极光"/}Image Credit & Copyright: Göran Strand说明: 天空发生了什么事?有极光。在这个月稍早,我们的太阳发生日冕物质抛射,把成团的高速电子、质子和离子洒向地球。部分的这团物质后来撞到地球的磁层,并在鲜明间隙的推波助澜下,为许多高纬度地区带来非常壮观的极光冕。上面这幅主题影像,呈现从瑞典一处俯视厄斯特松德市的景点,所见到悬在瑞典森林上空分外美丽的极光冕。有些人会认为这团因电离大气氧原子与电子复合所产生的摇曳泛绿光影,形似庞大的鲸鱼,不过仍请儘管分享你的见解。持续数年极为安静的太阳极小期已然过去。在11年的活动磁周期里,太阳逐渐接近活动极大期,所以像上面这种戏剧性的极光必然会越来越常见。{lamp/}原文:{mtitle title="A Whale of an Aurora over Swedish Forest"/}Image Credit & Copyright: Göran StrandExplanation: What's that in the sky?An aurora.A large coronal mass ejection occurred on our Sun earlier this month, throwing a cloud of fast-moving electrons, protons, and ions toward the Earth.Part of this cloud impacted our Earth's magnetosphere and, bolstered by a sudden gap, resulted in spectacular auroras being seen at some high northern latitudes.Featured here is a particularly photogenic auroral corona captured above a forest in Sweden from a scenic perch overlooking the city of Östersund.To some, this shimmering green glow of recombining atmospheric oxygen might appear like a large whale, but feel free to share what it looks like to you. The unusually quiet Sun of the past few years has now passed.As our Sun now approaches a solar maximum in its 11-year solar magnetic cycle, dramatic auroras like this are sure to continue.
2022年03月22日
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2018-05-06
2018年05月06日:布莱斯峡谷上空的流星、行星与银河-(Meteors, Planes, and a Galaxy over Bryce Canyon)
2018年05月06日:布莱斯峡谷上空的流星、行星与银河-(Meteors, Planes, and a Galaxy over Bryce Canyon)--原图下载{mtitle title="布莱斯峡谷上空的流星、行星与银河"/}Image Credit & Copyright: Dave Lane说明: 有时候,天与地可以同时美丽和忙碌兼备。这幅影像前景的地貌,位在美国.犹他州的布莱斯峡谷之内,而该地是以历经数百万年浸蚀的奇石着称。上方很上镜头的天空景象,有我们银河系的弧形中央盘面、三架路过地平线附近的飞机所留下的短光痕、至少4颗宝瓶座流星留下的长光痕、以及包括夏三角在内的众多亮星。上面这幅全景主题影像,是由2014年当晚所拍摄的12张较小範围照片拼接而成。年年复现的宝瓶座流星雨,今年在昨晚和今晚达到极大期,而够耐心且眼睛适应幽暗环境的观星人,预期每数分钟可见到一颗流星。 站务公告:APOD成大物理分站,即日起搬移到http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/apod.html,旧站将在二星期后关闭。 明日的图片: unusually placed rock{lamp/}原文:{mtitle title="Meteors, Planes, and a Galaxy over Bryce Canyon"/}Image Credit & Copyright: Dave LaneExplanation: Sometimes land and sky are both busy and beautiful.The landscape pictured in the foreground encompasses Bryce Canyon in Utah, USA, famous for its many interesting rock structures eroded over millions of years.The featured skyscape, photogenic in its own right, encompasses the arching central disk of our Milky Way Galaxy, the short streaks of three passing planes near the horizon, at least four long streaks that are likely Eta Aquariid meteors, and many stars including the three bright stars that make up the Summer Triangle.The featured image is a digital panorama created from 12 smaller images during this date in 2014.Recurring every year, yesterday and tonight mark the peak of this year's Eta Aquriids meteor shower, where a patient observer with dark skies and dark-adapted eyes might expect to see a meteor every few minutes.
2018年05月06日
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2015-03-10
2015年03月10日:冰岛冰川上空的极光-(Aurora over Icelandic Glacier)
[2015年03月10日:冰岛冰川上空的极光-(Aurora over Icelandic Glacier)--原图下载](https://apod.nasa.gov/apod/image/1503/AuroraGlacier_woodend_5760.jpg"onMouseOver="if (document.images)document.imagename1.src='image/1503/AuroraGlacier_woodend_1080_annotated_reflectiononly.jpg';"onMouseOut="if (document.images)document.imagename1.src='image/1503/AuroraGlacier_woodend_1080.jpg';){mtitle title="冰岛冰川上空的极光"/}Image Credit & Copyright: James Boardman Woodend (Images Inspired by Nature)说明: 数个关键的要素结合起来构成了这幅得奖的影像。其中包括清朗接近无云的夜空,壮观的极光,更有一滩静谧无冰的水体来倒映星星。这张主题影像所呈现的天空光景和宁静地貌,摄于1年前1月的冰岛.Vatnajökull冰川,前景则是Jökulsárlón冰山礁湖。随着太阳接近极大期,不停地把高速的电浆团喷入太阳系,地球极区充满极光的天空是常见之景观。{lamp/}原文:{mtitle title="Aurora over Icelandic Glacier"/}Image Credit & Copyright: James Boardman Woodend (Images Inspired by Nature)Explanation: Several key conditions came together to create this award-winning shot.These included a dark night, few clouds, an epic auroral display, and a body of water that was both calm enough and unfrozen enough to show reflected stars.The featured skyscape of activity and serenity appeared over Iceland's Vatnaj�kull Glacier a year ago January, with the J�kuls�rl�n Iceberg Lagoon captured in the foreground.Aurora filled skies continue to be common near Earth's poles as our Sun, near Solar Maximum, continues to expel energetic clouds of plasma into the Solar System.
2015年03月10日
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