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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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2023-09-09
2023年09月09日:西村彗星-(Comet Nishimura Grows)
2023年09月09日:西村彗星-(Comet Nishimura Grows)--原图下载{mtitle title="西村彗星"/}Credit & Copyright: Peter Kennett说明: 西村彗星正在成长。更精确的说,随着西村彗星(C/2023P1 Nishimura) 接近太阳,其彗尾正在增长。这颗刚在上个月发现的彗星,已经运行到地球的公转轨道之内,目前的亮度也接近肉眼可见。在下星期,这颗彗星将来到离地球最近的位置,然后再过一週的9月17日抵达近日点。根据猜测,西村彗星上次造访太阳系内围时所释出的冰和尘埃,可能造就了极大期在每年12月的长蛇σ流星雨。如此为真,那么随着新的彗星碎片补充进来,这群流星雨可能会变得更加活跃。上图为4晚之前摄于美国.新墨西哥州埃奇伍德镇的西村彗星,及其受太阳风吹袭而伸展的颀长离子尾之结构。下星期的日落后,可在西方的地平线附近,寻找这颗彗发持续增亮、彗尾也不断增长的彗星。(Sigma Hydrids meteor shower 长蛇σ流星雨){lamp/}原文:{mtitle title="Comet Nishimura Grows"/}Credit & Copyright: Peter KennettExplanation: Comet Nishimura is growing.More precisely, the tails C/2023 P1 (Nishimura) are growing as it nears the Sun.Discovered only last month, the comet is already near naked eye brightness as it now moves inside the Earth's orbit. The comet will be nearest the Earth next week, but nearest the Sun the week after -- on September 17. Speculation holds that expelled ice and dust from Comet Nishimura's last visit to the inner Solar System may have created the Sigma Hydrids meteor shower which peaks yearly in December. If so, then this meteor shower may become more active,refreshed with new comet debris.Pictured, Comet Nishimura was captured from Edgewood, New Mexico, USA four nights ago, showing a long ion tail structured by interactions with the Sun's wind.Look for this comet near your eastern horizon just before sunrise for the next few mornings, but very near your western horizon just after sunset next week -- as its coma continues to brighten and its tails continue to grow.
2023年09月09日
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2023-04-19
2023年04月19日:拉普兰上空的极光暴-(Auroral Storm over Lapland)
2023年04月19日:拉普兰上空的极光暴-(Auroral Storm over Lapland)--原图下载{mtitle title="拉普兰上空的极光暴"/}Image Credit &Copyright: Juan Carlos Casado(Starry Earth,TWAN)说明: 在某些夜晚,天空有城里最精采的戏码。例如此影像记录的这个夜晚,极光布满整个天空,而创造出这场七彩缤纷天空秀的磁暴,其源头则是日益活跃的太阳。这是一场出乎意表的极光活动,因为在前一天迎面而来的日冕物质抛射刚和地球擦身而过,所以万没想到这个磁暴会触发极光。在前景里,两个惊讶但颇为快乐的极光猎手,正凝视着令人惊奇且快速变化的天空。不管预测怎么说,在地球的夜空中,不仅在遥远的北方,连在在美国最南的新墨西哥州都曾有极光出没。在这幅呈现芬兰.拉普兰北部Saariselkä上空的广角影像里,所见到的明亮极光,其细緻程度、色彩範围和在天空分布的广度都异于寻常。鲜明的黄、绿、红和紫色极光之色彩,是因地球大气高层的氧和氮原子受到入射电子的激发所致。{lamp/}原文:{mtitle title="Auroral Storm over Lapland"/}Image Credit &Copyright: Juan Carlos Casado(Starry Earth,TWAN)Explanation: On some nights the sky is the best show in town. On this night, auroras ruled the sky, and the geomagnetic storm that created this colorful sky show originated from an increasingly active Sun.Surprisingly, since the approaching solar CME the day before had missed the Earth, it was not expected that this storm would create auroras.In the foreground, two happily surprised aurora hunters contemplate the amazing and rapidly changing sky.Regardless of forecasts, though, auroras were reported in the night skies of Earth not only in the far north, but as far south as New Mexico, USA. As captured in a wide-angle image above Saariselkä in northern Finnish Lapland, a bright aurora was visible with an unusually high degree of detail, range of colors, and breadth across the sky. The vivid yellow, green, red and purple auroral colors are caused by oxygen and nitrogen atoms high in Earth's atmosphere reacting to incoming electrons.
2023年04月19日
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2021-01-18
2021年01月18日:超新星遗迹─延髓星云-(The Medulla Nebula Supernova Remnant)
2021年01月18日:超新星遗迹─延髓星云-(The Medulla Nebula Supernova Remnant)--原图下载{mtitle title="超新星遗迹─延髓星云"/}Image Credit & Copyright: Russell Croman说明: 是什么在驱动这个不寻常的星云?CTB-1是大约10,000年前,仙后座方向一颗大质量恒星发生爆炸,所留下来的扩张气壳。这颗恒星之所以发生爆炸,则是它核心附近用来进行核融合、产生压力保持结构稳定的元素耗尽。所形成的超新星遗迹,因为形似延髓而有延髓星云的称号,而至如今在可见光波段,仍能见到扩张碎片云冲撞周遭星际气体所发出的光。至于这团星云为何会发出X射线辉光,仍然是待解的谜团。诸多假说之一宣称,在这颗恒星爆炸同时产生的波霎,也在以快速外扩的恒星风驱动这团星云。循着这个线索,最近真的在电波波段找到一颗、看似在超新星爆炸时以每秒超过1000公里高速抛出的波霎。虽然延髓星云的张角和满月相当,不过它极端昏暗,位在美国.新墨西哥州的2部小望远镜,进行了130小时的曝光才建构出这幅主题影像。(Medulla Nebula 延髓星云){lamp/}原文:{mtitle title="The Medulla Nebula Supernova Remnant"/}Image Credit & Copyright: Russell CromanExplanation: What powers this unusual nebula?CTB-1 is the expanding gas shell that was left when a massive star toward the constellation of Cassiopeia exploded about 10,000 years ago.The star likely detonated when it ran out of elements, near its core, that could create stabilizing pressure with nuclear fusion.The resulting supernova remnant, nicknamed the Medulla Nebula for its brain-like shape, still glows in visible light by the heat generated by its collision with confining interstellar gas. Why the nebula also glows in X-ray light, though, remains a mystery.One hypothesis holds that an energeticpulsar was co-created that powers the nebula with a fast outwardly moving wind.Following this lead, a pulsar has recently been found in radio waves that appears to have been expelled by the supernova explosion at over 1000 kilometers per second. Although the Medulla Nebula appears as large as a full moon, it is so faint that it took 130-hours of exposure with two small telescopes in New Mexico, USA, to create the featured image.
2021年01月18日
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2008-04-06
2008年04月06日:马头星云四周的云气丝-(Wisps Surrounding the Horsehead Nebula)
2008年04月06日:马头星云四周的云气丝-(Wisps Surrounding the Horsehead Nebula)--原图下载{mtitle title="马头星云四周的云气丝"/}Credit & Copyright: Star Shadows Remote Observatory说明: 着名的猎户马头星云并不孤单,长时间曝光影像显示,影像中左下方这片我们很熟悉的暗色斑块 ,是一个巨大的尘埃和辉光云气团之一部份。为了得到这片马头星野的细微结构,美国.新墨西哥州星影远距天文台的业余天文学家,在氢原子所发出某一特定的红光波段,用一部小望远镜对这区域进行七小时的摄影,所得的影像再和另一幅曝光三小时的全彩影像叠加,才得到这张壮丽的照片;影像中清楚可见许多亘古以来被恒星风和古超新星所雕塑出来的云气丝和尘埃带。马头星云位在北天的猎户座里,距离我们约有一千五百光年。在这张影像里,可见到猎人腰带三星的其中两颗。{lamp/}原文:{mtitle title="Wisps Surrounding the Horsehead Nebula"/}Credit & Copyright: Star Shadows Remote ObservatoryExplanation: The famous Horsehead Nebula in Orion is not alone. A deep exposure shows that the dark familiar shaped indentation, visible just below center, is part of a vast complex of absorbing dust and glowing gas. To bring out details of the Horsehead's pasture, amateur astronomers at the Star Shadow Remote Observatory in New Mexico, USA fixed a small telescope on the region for over seven hours filtering out all but a very specific color of red light emitted by hydrogen. They then added the image to a full color frame taken over three hours. The resulting spectacular picture details an intricate tapestry of gaseous wisps and dust-laden filaments that were created and sculpted over eons by stellar winds and ancient supernovas. The Horsehead Nebula lies 1,500 light years distant towards the constellation of Orion. Two stars from the Orion's Belt can be found in the above image.
2008年04月06日
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2006-12-13
2006年12月13日:-(A Large Tsunami Shock Wave on the Sun)
2006年12月13日:-(A Large Tsunami Shock Wave on the Sun)--原图下载{mtitle title=""/}Credit: NSO/AURA/NSF and USAF Research Laboratory说明: 地球上从未发生过的大海啸。一週前,一个从地球大小般的太阳黑子发出的闪焰产生了海啸般的震波。如上图,在美国新墨西哥洲的光学太阳巡天网(Optical Solar Patrol Network, OSPAN)观测到这个震波从太阳活跃区 AR 10930 向外扩散时的影像。这个震波,或称为莫尔顿波,会使太阳光球层里的气体,包括氢气,加热并压缩,接着发出强光。上图是用氢原子发射的特殊红光 (编按:H-alpha) 波段拍摄的 。这次海啸般的冲击也产生了一些活跃的细丝,不过大多数在不久后就复原了。这次日啸传播的速度约是每小时一百万公里,在几分钟内便环绕太阳一圈。 明日的图片: open space{lamp/}原文:{mtitle title="A Large Tsunami Shock Wave on the Sun"/}Credit: NSO/AURA/NSF and USAF Research LaboratoryExplanation: Tsunamis this large don't happen on Earth. One week ago, a large solar flare from an Earth-sized sunspot produced a tsunami-type shock wave that was spectacular even for the Sun. Pictured above, the tsunami wave was captured moving out from active region AR 10930 by the Optical Solar Patrol Network (OSPAN) telescope in New Mexico, USA. The resulting shock wave, known technically as a Moreton wave, compressed and heated up gasses including hydrogen in the photosphere of the Sun, causing a momentarily brighter glow. The above image was taken in a very specific red color emitted exclusively by hydrogen gas. The rampaging tsunami took out some active filaments on the Sun, although many re-established themselves later. The solar tsunami spread at nearly one million kilometers per hour, and circled the entire Sun in a matter of minutes.
2006年12月13日
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2006-02-21
2006年02月21日:马头星云周围的云气丝-(Wisps Surrounding the Horsehead Nebula)
2006年02月21日:马头星云周围的云气丝-(Wisps Surrounding the Horsehead Nebula)--原图下载{mtitle title="马头星云周围的云气丝"/}Credit & Copyright: Star Shadows Remote Observatory说明: 着名的猎户马头星云并不孤单,长时间曝光影像显示,影像中左下方这片我们很熟悉的暗色斑块,是一个巨大尘埃和辉光云气团的一部份。为了得到这片马头星野的细微结构,美国.新墨西哥州星影远距天文台的业余天文学家,在氢原子所发出的某一特定红光波段,用一部小望远镜对这区域进行七小时的摄影,所得的影像再和另一幅曝光三小时的全彩影像叠加,才得到这张壮丽的照片;影像中清楚可见许多亘古以来被恒星风和古超新星所雕塑出来的云气丝和尘埃带。马头星云位在北天的猎户座里,距离我们约有一千五百光年。在这张影像里,可见到猎人腰带三星的其中两颗。{lamp/}原文:{mtitle title="Wisps Surrounding the Horsehead Nebula"/}Credit & Copyright: Star Shadows Remote ObservatoryExplanation: The famous Horsehead Nebula in Orion is not alone. A deep exposure shows that the dark familiar shaped indentation, visible just below center, is part of a vast complex of absorbing dust and glowing gas. To bring out details of the Horsehead's pasture, amateur astronomers at the Star Shadow Remote Observatory in New Mexico, USA fixed a small telescope on the region for over seven hours filtering out all but a very specific color of red light emitted by hydrogen. They then added the image to a full color frame taken over three hours. The resulting spectacular picture details an intricate tapestry of gaseous wisps and dust-laden filaments that were created and sculpted over eons by stellar winds and ancient supernovas. The Horsehead Nebula lies 1,500 light years distant towards the constellation of Orion. Two stars from the Orion's Belt can be found in the above image.
2006年02月21日
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