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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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2023-08-14
2023年08月14日:韦伯望远镜的环状星云-(The Ring Nebula from Webb and Hubble)
2023年08月14日:韦伯望远镜的环状星云-(The Ring Nebula from Webb and Hubble)--原图下载{mtitle title="韦伯望远镜的环状星云"/}Credit: NASA,ESA,CSA,JWST,HST;Processing: Zi Yang Kong, Go Webb!说明: 环状星云(M57)远比透过小望远镜所见的要複杂得多。通常轻易可见的是直径约1光年的中心环,然而,来自韦伯太空望远镜的这幅精采长曝光红外影像,深入的探索了这个热门的星云。在这幅经过数位强化的代表色主题影像里,中心环周围清楚可见的气体丝,形似宇宙之眼的睫毛。而长线形的结构,或许是环内的緻密气体结,遮挡来自内部的高能星光所产生的影子。环状星云是个细长形的行星状星云,为类太阳恒星演化抛出外层大气成为白矮星时,所产生的气体云。环状星云的中心椭圆结构,位在以乐器为名的天琴座方向约2500光年远之处。{lamp/}原文:{mtitle title="The Ring Nebula from Webb and Hubble"/}Credit: NASA,ESA,CSA,JWST,HST;Processing: Zi Yang Kong, Go Webb!Explanation: The Ring Nebula (M57), is more complicated than it appears through a small telescope. The easily visible central ring is about one light-year across,but this remarkable combined exposure by the James Webb Space Telescope and the Hubble Space Telescope explores this popular nebula with deep exposures in visible and infrared light.Strings of gas, like eyelashes around a cosmic eye, become evident around the Ringin this digitally enhanced featured image in assigned colors.These long filaments may be caused by shadowing of knots of dense gas in the ring from energetic light emitted within.The Ring Nebula is an elongated planetary nebula, a type of gas cloud created when a Sun-like star evolves to throw off its outer atmosphere to become a white dwarf star. The central oval in the Ring Nebula lies about 2,500 light-years away toward the musicalconstellationLyra.
2023年08月14日
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2014-04-19
2014年04月19日:地球级的行星克卜勒-186f-(Earth-size Kepler-186f)
2014年04月19日:地球级的行星克卜勒-186f-(Earth-size Kepler-186f)--原图下载{mtitle title="地球级的行星克卜勒-186f"/}Illustration Credit:NASA Ames /SETI Institute /JPL-Caltech,Discovery: Elisa V. Quintana, et al.说明: 行星克卜勒-186f (开普勒-186f;Kepler-186f)是现知第一颗位在适居带之内的地球级系外行星。在搜寻行星的克卜勒卫星数据里发现的这颗遥远行星,所环绕的母星是一个低温、黯淡的M族矮星。这颗位在天鹅座内的恒星,质量和大小皆只有太阳的一半,离我们大约有500光年远。而在我们银河系之内,M族矮星很常见,将近有百分之七十的恒星皆是这类矮星。因为位在适居带之内,所以表面温度让液态水可能得以存在的克卜勒-186f,离这颗M族母星5千3百万公里远,和水星绕太阳的轨道相近,每130天绕母星一次。这个遥远的恒星系统还拥有其他四颗行星,皆稍大于地球,轨道都非常靠近母星,就如这张图片所揭示。虽然克卜勒-186f的大小和轨道皆已知,但其质量和组成皆不明,因为克卜勒卫星所使用的凌越法并不能提供这些资讯。不论如何,模拟指出它可能是石质、有大气,所以它或许是到目前为止最像地球的系外行星…{lamp/}原文:{mtitle title="Earth-size Kepler-186f"/}Illustration Credit:NASA Ames /SETI Institute /JPL-Caltech,Discovery: Elisa V. Quintana, et al.Explanation: Planet Kepler-186f isthe first known Earth-size planet tolie within the habitable zoneof a star beyond the Sun.Discoveredusing data from the prolificplanet-huntingKepler spacecraft,the distant world orbits its parent star,a cool, dim, M dwarf star about half the size and mass of the Sun,some 500 light-years away in the constellation Cygnus.M dwarfsare common, making up about 70 percent of the stars inour Milky Way galaxy.To be withinthe habitable zone,where surface temperatures allowing liquid water are possible,Kepler-186f orbits close,within 53 millionkilometers (about the Mercury-Sun distance) of the M dwarf star,once every 130 days.Four other planets are known in the distant system.All four are only a little larger than Earth and in much closer orbits,also illustrated in the tantalizing artist's vision.While the size and orbit of Kepler-186f are known,its mass and composition are not, and can't be determined byKepler's transit technique.Still, models suggest that it could be rocky and have an atmosphere,making it potentiallythe most Earth-like exoplanetdiscoveredso far ...
2014年04月19日
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2008-01-19
2008年01月19日:星空与城堡-(Starry Night Castle)
2008年01月19日:星空与城堡-(Starry Night Castle)--原图下载{mtitle title="星空与城堡"/}Credit & Copyright: P-M Hedén说明: 在这张由古蹟与星空计画所提供的动人影像里,迷人的昴宿星团就像是悬挂在黝黑城堡塔楼上方的树稍。这幅月初时所拍摄的星空影像,也呈现了昴宿星团下方的亮星毕宿五,以及影像中上方那小团暗淡云雾状的霍姆斯彗星。或许「星夜堡」会是前景这座中世纪残破古堡的合适名称,但它真实的名称是莫比城堡 (Mörby Castle),座落在瑞典.Norrtälje的Skedviken湖畔。{lamp/}原文:{mtitle title="Starry Night Castle"/}Credit & Copyright: P-M HedénExplanation: The tantalizingPleiades star cluster seems to liejust beyond the trees above a darkcastletower in thisdramaticview of The World at Night.Recorded earlier this month, the starry sky also features bright starAldebaran below the Pleiades and a small,faint, fuzzy cloud otherwise known asComet Holmes nearpicture center at the top of the field.Starry Night Castlemight be an appropriate name forthe medieval castle ruin in the foreground.But its traditional name isMörby Castle, foundnorth of Stockholm, near lake Skedviken in Norrtälje, Sweden.
2008年01月19日
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