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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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2022-09-25
2022年09月25日:老鹰星云的仙女-(The Fairy of Eagle Nebula)
2022年09月25日:老鹰星云的仙女-(The Fairy of Eagle Nebula)--原图下载{mtitle title="老鹰星云的仙女"/}Image Credit: Image Credit: NASA, ESA, The Hubble Heritage Team (STScI/AURA)说明: 老鹰星云的众多尘埃雕塑正在蒸发之中。随着强烈星光慢慢削去冰冷的宇宙山峰,让这些残存的雕像般云气柱,看来像是神话中的珍禽异兽。上面这幅影像,呈现了老鹰星云数根精采的尘埃柱之一,因为它看似一尊巨大的外星仙女。只不过,这位仙女的身高足有10光年,而且会喷出比人间凡火温度高非常多的辐射。整个老鹰星云 (M16),事实上是一个庞大且在蒸发之中的云气和尘埃壳,内部藏着一个不断成长的空穴,空穴内有正在形成疏散星团的庞大恒星诞生区。这根距离我们约7,000光年远的庞大云柱,则可能会在100,000年左右蒸发殆尽。这张由哈伯太空望远所拍摄的主题影像,其色泽根据科学内涵重新置换过。{lamp/}原文:{mtitle title="The Fairy of Eagle Nebula"/}Image Credit: Image Credit: NASA, ESA, The Hubble Heritage Team (STScI/AURA)Explanation: The dust sculptures of the Eagle Nebula are evaporating. As powerful starlight whittles away thesecool cosmic mountains, thestatuesque pillars that remainmight be imagined as mythical beasts. Featured here is one of several strikingdust pillars of theEagle Nebulathat might be described as a gigantic alienfairy. This fairy, however, is tenlight years tall and spews radiation much hotter thancommon fire.The greater Eagle Nebula, M16,is actually a giant evaporating shell of gas anddust inside of which is a growingcavity filled with a spectacular stellar nursery currently forming anopen cluster of stars. This great pillar, which is about 7,000 light years away, will likely evaporate away in about 100,000 years. The featured image is in scientifically re-assigned colors andwas taken by the Earth-orbiting Hubble Space Telescope.
2022年09月25日
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2018-12-01
2018年12月01日:珠穆朗玛峰上空的恆星迹线-(Mount Everest Star Trails)
2018年12月01日:珠穆朗玛峰上空的恆星迹线-(Mount Everest Star Trails)--原图下载{mtitle title="珠穆朗玛峰上空的恆星迹线"/}Image Credit &Copyright: Jeff Dai(TWAN)说明: 在这幅山峦与夜空影像里入镜的,是地球的最高峰。这张在9月30日那晚,在珠峰基地营用固定在三脚架的相机连续拍摄的240张照片数位合成之影像,呈现了珠穆朗玛峰壁立的北面及受到明亮月光照耀的前景。这系列摄于1.5小时期间的照片,也记录了美丽多彩的恒星迹线。这些以远在崎岖地平线下方的南天极为中心的平滑同心弧,显示地球是在绕地轴自转。而恒星迹线的色泽,其实标示出恒星的温度;其中,较高温恒星的迹线色泽偏蓝,黄及红色泽的迹线来自比太阳低温的恒星。{lamp/}原文:{mtitle title="Mount Everest Star Trails"/}Image Credit &Copyright: Jeff Dai(TWAN)Explanation: The highest peak onplanet Earthis framed in this mountain and night skyscape.On September 30, the digital stack of 240 sequential exposuresmade with a camera fixed to a tripod at an EverestBase Camp captured the sheernorth faceof the Himalayan mountain and foreground illuminatedby bright moonlight.Taken over 1.5 hours, the sequence also recorded colorful star trails.Reflecting the planet's daily rotation on its axis,their motion is along gentle concentric arcs centered on thesouth celestial pole,a point well below the rugged horizon.The colorof the trails actually indicates the temperatures of the stars.Blueish hues are from hotter stars, and yellow to reddish huesare from stars cooler than the Sun.
2018年12月01日
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2014-03-24
2014年03月24日:冰岛上空的猎户座和极光-(Orion and Aurora over Iceland)
2014年03月24日:冰岛上空的猎户座和极光-(Orion and Aurora over Iceland)--原图下载{mtitle title="冰岛上空的猎户座和极光"/}Image Credit & Copyright: �orvar�ur �rnason说明: 如果你看到这样的天空,记得拍下它。一个月前在冰岛,一位爱冒险的摄影者碰巧见到满天空的极光,其反应正是如此。该时影像的前景有Orafajokull成层火山,背景有许多天空珍宝,包括极光和其左方的猎户座。极光是太阳的高能粒子冲撞地球磁环境的产物;随着高能电子和质子进入地球的极区撞击大气,造成空气分子的电子跃迁到激发态,当氧分子的电子返回基态时,就会发出绿光。极光的形状和色泽皆非常多变。{lamp/}原文:{mtitle title="Orion and Aurora over Iceland"/}Image Credit & Copyright: �orvar�ur �rnasonExplanation: If you see a sky like this -- photograph it.A month ago in Iceland, an adventurous photographer chanced across a sky full of aurora and did just that.In the foreground lies the stratovolcano �r�faj�kull.In the background, among other sky delights, lies the constellation of Orion, visible to the aurora's left. Auroras are sparked by energetic particles from the Sun impacting the magnetic environment around the Earth. Resultant energetic particles such as electrons and protons rain down near the Earth's poles and impact the air. The impacted air molecules obtain excited electrons, and when electrons in oxygen molecules fall back to their ground state, they emit green light. Auroras are known to have many shapes and colors.
2014年03月24日
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