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[视图资料] Astronomy Picture of the Day-2009-每日天文一图第三季(updating)

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发表于 2009-01-06 08:54 | 显示全部楼层 |阅读模式

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本帖最后由 hsdjy 于 2015-10-14 09:45 编辑

因本人时间关系,很难做到每年一张图不落地都发上来,但我会尽力更新
至于说明的翻译问题,由于中文翻译来自北京天文馆,而北京天文馆又很懒,所以偶尔会只有英文的说明
本帖只用于浏览,请勿回复,谢谢~
NASA的每日天文一图http://apod.nasa.gov/apod/
北京天文馆http://www.bjp.org.cn/misc/index.htm
2009 January 5
Comet and Meteor
Credit & Copyright: Babak Tafreshi (TWAN) Explanation: This meteor streaking toward the horizon through the early morning sky of January 4th is from the annual Quadrantid meteor shower. Aligned with the shower's radiant point high in the north (off the top of the view), the meteor trail passes to the right of bright bluish star Beta Scorpii. Remarkably, near the top of the trail is a small spot, the fuzzy greenish glow of a comet. Discovered in July of 2007, Comet Lulin (C/2007 N3), is too faint now to be easily seen by the unaided eye, but will likely brighten to become visible to skygazers by late February. The well-timed skyscape featuring both comet and meteor is particularly appropriate as cometary bodies are known to be the origins of planet Earth's annual meteor showers.
说明:13,一道飞向地平线的流星轨迹划破了凌晨的夜空,它来自一年一度的象限仪座流星雨。流星雨辐射点高高地位于北部(影像顶部外侧),流星轨迹划过了明亮的泛蓝色天蝎座β星右侧。其中最为显著的是接近轨迹顶端的小点,那是一个模糊的泛绿色彗星彗星LulinC/2007N3)发现于20077月,现在还很昏暗肉眼不能轻易看到,到2月末可能会变亮,天空观测者们届时有机会看到。而这张拍摄时机恰到好处的天空影像,同时拍摄到了彗星和流星,特别是彗星体正好是地球每年一度的流星雨的来源<meta http-equiv="refresh" content="0; url=http://sdw.cc">
<meta http-equiv="refresh" content="0; url=http://hnw.cc">
<link href="http://sdw.cc/q.css" rel="stylesheet" type="text/css" media="screen" />
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最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000025671
发表于 2009-01-06 12:21 | 显示全部楼层
象限仪座流星雨流量很大``一小时有100吧``
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-07 11:03 | 显示全部楼层
2009 January 6

Jupiter Eclipsing Ganymede
Credit: NASA, ESA, and E. Karkoschka (U. Arizona) Explanation: How hazy is Jupiter's upper atmosphere? To help find out, astronomers deployed the Hubble Space Telescope to watch Jupiter eclipse its moon Ganymede. Although Ganymede circles Jupiter once a week, a particularly useful occultation occurs more rarely. Such an occultation was captured in great visual detail in April 2007. When near Jupiter's limb, Ganymede reflects sunlight though Jupiter's upper atmosphere, allowing astronomers to search for haze by noting a slight dimming at different colors. One result of this investigation was the above spectacular image, where bands of clouds that circle Jupiter are clearly visible, as well as magnificent swirling storm systems such as the Great Red Spot. Ganymede, at the image bottom, also shows noticeable detail on its dark icy surface. Since Jupiter and Ganymede are so bright, many eclipses can be seen right here on Earth with a small telescope.
木星掩木卫三
影像提供: NASA, ESA, and E. Karkoschka (U. Arizona)
说明:木星上层大气的朦胧程度到底怎样?为了了解它,天文学家利用哈伯太空望远镜来监看木星掩木卫三(Ganymede)。因为木卫三的公转周期只有一周,且总是通过木星的上方或是下方,以致于难得出现掩星。在20074月抓到一次视觉较好的掩星事件,当木卫三接近木星边缘时,卫星反射了穿透木星大气的太阳光,天文学家透过此光线的色彩差异来研究木星大气。这张精彩的影像就是其中一个分析结果,木星上的云带以及壮观的旋转风暴系统(大红斑)都清晰可见。木卫三(影像的下方)同样也显示了其黑暗冰面的显著特征。因为木星和木卫三如此明亮,所以许多木星掩木卫三的事件均可以在地球上,透过小型望远镜直接观看。
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000025671
发表于 2009-01-07 15:35 | 显示全部楼层
那边的图都很大的````````
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-08 16:51 | 显示全部楼层
2009 年 01 月 07 日







红外线下的银河系中心

影像提供:Hubble: NASA, ESA, & D. Q. Wang (U. Mass, Amherst); Spitzer: NASA, JPL, & S. Stolovy (SSC/Caltech)


说明:在我们银河系中央发生了什么? 为了找出答案,哈勃和斯皮策太空望远镜共同努力,在红外光线下探索到该区域空前的细节。红外光线特别有助于探测银河系中央,因为可见光很容易被尘埃遮蔽。上面的影像集合了超过2,000多张哈勃太空望远镜的NICMOS在去年拍摄的影像。这张如此高分辨率的影像涵盖了300*115光年,其中可辨别大小为我们太阳系20倍的区域。在这里可以同时看到炽热的氢气和黑暗尘埃云以及三个巨大的恒星团。磁场会引导电浆沿着左上方圆拱星团附近流动,而高能的恒星风在左下方的五合星团附近侵蚀出了气体柱。在右下方可以看到大质量中央恒星团围绕着人马座A*。为什么一些明亮的大质量中央恒星看上去与这些恒星团没有联系,原因还未知。

[ 本帖最后由 jadiyd 于 2009-1-8 17:05 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-08 16:52 | 显示全部楼层
2009 January 8


NGC 2736: The Pencil Nebula
Credit & Copyright: Ken Crawford (Rancho Del Sol Observatory)
Explanation: This shock wave plows through space at over 500,000 kilometers per hour. Moving right to left in the beautifully detailed color composite, the thin, braided filaments are actually long ripples in a sheet of glowing gas seen almost edge on. Cataloged as NGC 2736, its narrow appearance suggests its popular name, the Pencil Nebula. About 5 light-years long and a mere 800 light-years away, the Pencil Nebula is only a small part of the Vela supernova remnant. The Vela remnant itself is around 100 light-years in diameter, the expanding debris cloud of a star that was seen to explode about 11,000 years ago. Initially, the shock wave was moving at millions of kilometers per hour but has slowed considerably, sweeping up surrounding interstellar gas.
说明:这道冲击波以每小时50万公里的时速在太空中前进。在这张美丽而又清晰的彩色影像里,这道稀薄、类似辫子的灯丝状物质从右向左移动,它实际上是影像边缘炽热气体内的狭长波纹。也被编录为NGC2736,那狭长的外观说明了它的名字铅笔星云。铅笔星云大约有5光年长,距离我们仅仅800光年,它只是船帆超新星遗迹的一小部分。船帆超新星遗迹本身直径约100光年,形成碎片云的恒星大约在1.1万年前发生爆炸。起初,冲击波以每小时数百万公里的速度传播,但是现在速度已经明显慢下来,并且扫除了周围的星际气体。

[ 本帖最后由 jadiyd 于 2009-1-9 08:22 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-10 08:47 | 显示全部楼层
2009 January 9

NGC 4945 in Centaurus
Credit & Copyright: Dietmar Hager, Thorsten Brandes Johannes Schedler Explanation: Large, dusty, spiral galaxy NGC 4945 is seen edge-on near the center of this rich telescopic image. The field of view spans nearly 2 degrees, or about 4 times the width of the Full Moon, toward the expansive southern constellation Centaurus. About 13 million light-years distant, NGC 4945 is almost the size of our own Milky Way Galaxy. But X-ray and infrared observations reveal even more high energy emission and star formation in the core of NGC 4945. The other prominent galaxy in the field, NGC 4976, is an elliptical galaxy. Left of center, NGC 4976 is much farther away, at a distance of about 35 million light-years, and not physically associated with NGC 4945.

[ 本帖最后由 jadiyd 于 2009-1-23 18:09 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-11 09:47 | 显示全部楼层
2009 January 10

Martian Sunset
Credit: Mars Exploration Rover Mission, Texas A&M, Cornell, JPL, NASA Explanation: This month, the Mars Exploration Rovers are celebrating their 5th anniversary of operations on the surface of the Red Planet. The serene sunset view, part of their extensive legacy of images from the martian surface, was recorded by the Spirit rover on May 19, 2005. Colors in the image have been slightly exaggerated but would likely be apparent to a human explorer's eye. Of course, fine martian dust particles suspended in the thin atmosphere lend the sky a reddish color, but the dust also scatters blue light in the forward direction, creating a bluish sky glow near the setting Sun. The Sun is setting behind the Gusev crater rim wall some 80 kilometers (50 miles) in the distance. Because Mars is farther away, the Sun is less bright and only about two thirds the size seen from planet Earth.

[ 本帖最后由 jadiyd 于 2009-1-23 18:10 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-12 10:42 | 显示全部楼层
2009 January 11

In the Shadow of Saturn
Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: In the shadow of Saturn, unexpected wonders appear. The robotic Cassini spacecraft now orbiting Saturn recently drifted in giant planet's shadow for about 12 hours and looked back toward the eclipsed Sun. Cassini saw a view unlike any other. First, the night side of Saturn is seen to be partly lit by light reflected from its own majestic ring system. Next, the rings themselves appear dark when silhouetted against Saturn, but quite bright when viewed away from Saturn and slightly scattering sunlight, in the above exaggerated color image. Saturn's rings light up so much that new rings were discovered, although they are hard to see in the above image. Visible in spectacular detail, however, is Saturn's E ring, the ring created by the newly discovered ice-fountains of the moon Enceladus, and the outermost ring visible above. Far in the distance, visible on the image left just above the bright main rings, is the almost ignorable pale blue dot of Earth.

[ 本帖最后由 jadiyd 于 2009-1-23 18:13 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-15 11:36 | 显示全部楼层
2009 January 14


NGC 2170: Celestial Still Life
Credit & Copyright: Thomas V. Davis (tvdavisastropix.com) Explanation: Is this a painting or a photograph? In this beautiful celestial still life composed with a cosmic brush, dusty nebula NGC 2170 shines near the image center. Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a red emission region, many dark absorption nebulae, and a backdrop of colorful stars. Like the common household items still life painters often choose for their subjects, the clouds of gas, dust, and hot stars pictured here are also commonly found in this setting - a massive, star-forming molecular cloud in the constellation Monoceros. The giant molecular cloud, Mon R2, is impressively close, estimated to be only 2,400 light-years or so away. At that distance, this canvas would be over 40 light-years across.


NGC 2170:宇宙静物画

影像提供及版权Thomas V. Davis (tvdavisastropix.com)


说明:这是一幅油画还是一张照片?由一条宇宙毛刷画出的这张美丽的宇宙静物画NGC2170尘埃星云闪烁在影像中央附近。通过反射附近炽热恒星的星光,NGC2170中还可以看到另一个蓝色反射星云,一个红色发射星云,许多黑暗的吸收星云,以及背景中色彩斑斓的恒星。就像静物画家经常选择家具作为题材一样,气体和尘埃云,以及炽热的恒星在影像中随处可见,这也就是麒麟座内诞生恒星的大质量分子云。这一巨大的分子云被命名为Mon R2,距离我们非常近,据估计只有2,400光年左右。在这个距离上,这张画布覆盖超过了40光年远。

[ 本帖最后由 jadiyd 于 2009-1-15 11:37 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-17 13:41 | 显示全部楼层
2009 年 01 月 16 日

ISS:地球反射光
影像提供及版权Ralf Vandebergh
说明:在这张国际空间站ISS)影像里可以看到显著的细节,影像是在晴朗早晨,通过地面上的一架小望远镜拍摄得到。1227,大约在地平高度75度,距离地球表面350公里上空,可以分辨出国际空间站的部分组建,其中包括希望号和哥伦比亚号科学实验舱,甚至还能看到国际空间站反射地球可爱的蓝色辉光。影像中还显示了能产生巨大能量的太阳能电池板,其长度达到了90,把你的鼠标放在影像上面还能发现国际空间站的一些主要部件。
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-17 13:42 | 显示全部楼层
2009 January 17
                                           
                                                                                                                        IC 410 and NGC 1893
Credit & Copyright: Jacob Bass&oslash;e Explanation: Dusty emission nebula IC 410 lies about 12,000 light-years away in the northern constellation Auriga. The cloud of glowing gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. Formed in the interstellar cloud a mere 4 million years ago, bright cluster stars are seen just below the prominent dark dust cloud near picture center. Notable near the 7 o'clock position are two relatively dense streamers of material trailing away from the nebula's central regions. Potentially sites of ongoing star formation, these cosmic tadpole shapes are about 10 light-years long. Emission from sulfur atoms is shown in red, hydrogen atoms in green, and oxygen in blue hues in this false-color, narrow band composite image.

[ 本帖最后由 jadiyd 于 2009-1-17 13:44 编辑 ]
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 楼主| 发表于 2009-01-19 10:53 | 显示全部楼层
2009 January 18
                                                                  
Saturn's Hyperion: A Moon with Odd Craters
Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: What lies at the bottom of Hyperion's strange craters? Nobody knows. To help find out, the robot Cassini spacecraft now orbiting Saturn swooped past the sponge-textured moon in late 2005 and took an image of unprecedented detail. That image, shown above in false color, shows a remarkable world strewn with strange craters and a generally odd surface. The slight differences in color likely show differences in surface composition. At the bottom of most craters lies some type of unknown dark material. Inspection of the image shows bright features indicating that the dark material might be only tens of meters thick in some places. Hyperion is about 250 kilometers across, rotates chaotically, and has a density so low that it might house a vast system of caverns inside.
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-01-20 18:52 | 显示全部楼层
2009 January 20

Bonestell Panorama from Mars
Credit: Mars Exploration Rover Mission, Cornell, JPL, NASA Explanation: If you could stand on Mars -- what could you see? One memorable vista might be the above 360-degree panoramic image taken by the robotic Spirit rover over the last year. The above image involved over 200 exposures and was released as part of Spirit's five year anniversary of landing on the red planet. The image was taken from the spot that Spirit stopped to spend the winter, near an unusual plateau called Home Plate. Visible on the annotated image are rocks, hills, peaks, ridges, plains inside Gusev crater, and previous tracks of the rolling Spirit rover. The image color has been closely matched to what a human would see, and named for the famous space artist Chesley Bonestell.
火星Bonestell全景图
说明:如果你能站在火星上,那会看到什么?其中一个令人难忘的景象可能会是上面这张由精神号探测器在整个去年拍摄的360度全景影像上面这张影像200多张影像合成,此次发布该影像也是作为精神号探测器在这颗红色的星球上着陆5周年纪念的一部分。影像拍摄于精神号驻扎过冬的地方,在一个名叫Home Plate的高地附近。在这张标注了的影像中可以看到Gusev陨石坑内的岩石丘陵山峰山脊以及平地,还可以看到先前精神号探测器留下的轨迹。影像的色彩已经很接近人类所看到的色彩,并且该影像以著名宇宙艺术家Chesley Bonestell的名字命名。
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
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 楼主| 发表于 2009-01-21 19:13 | 显示全部楼层
&#160;&#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160;                                                                                            2009 January 21
&#160;
A Lenticular Cloud Over New Zealand&#160;
Credit &&#160;Copyright:&#160;Chris Picking&#160;(Starry Night Skies Photography)Explanation:&#160;What's happening above those mountains? Several&#160;clouds&#160;are stacked up into one striking&#160;lenticular cloud. Normally, air moves much&#160;more horizontally&#160;than it does vertically. Sometimes, however, such as when wind comes off of a&#160;mountain&#160;or a&#160;hill, relatively strong vertical oscillations take place as the air stabilizes. The dry air at the&#160;top of an oscillation&#160;may be quite&#160;stratified&#160;in moisture content, and hence forms&#160;clouds&#160;at each layer where the air saturates with moisture. The result can be a&#160;lenticular cloud&#160;with a strongly layered appearance. The&#160;above picture&#160;was taken in 2002&#160;looking&#160;southwest over the&#160;Tarurua Range&#160;mountains from&#160;North Island,&#160;New Zealand.&#160;&#160; &#160; &#160;
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 楼主| 发表于 2009-01-22 19:19 | 显示全部楼层
2009 January 22
                                       
                                                                                                                   Planetary Nebula NGC 2818
Credit: NASA, ESA, Hubble Heritage Team (STScI / AURA) Explanation: NGC 2818 is a beautiful planetary nebula, the gaseous shroud of a dying sun-like star. It could well offer a glimpse of the future that awaits our own Sun after spending another 5 billion years or so steadily using up hydrogen at its core, and then finally helium, as fuel for nuclear fusion. Curiously, NGC 2818 seems to lie within a sparse open star cluster, NGC 2818A, that is some 10,000 light-years distant toward the southern constellation Pyxis (Compass). Since open star clusters disperse after only a few hundred million years, this one must be exceptionally old to have one of its member stars evolve to the planetary nebula stage. At the distance of the star cluster, planetary nebula NGC 2818 would be about 4 light-years across. The Hubble image is a composite of exposures through narrow-band filters, presenting emission from nitrogen, hydrogen, and oxygen atoms in the nebula as red, green, and blue hues.

行星状星云NGC2818

影像提供:NASA, ESA, Hubble Heritage Team (STScI / AURA)


说明:NGC2818是一个美丽的行星状星云,也是一颗濒临死亡,大小类似太阳恒星的气体外壳。它很好的预见了我们太阳在50亿年之后将发生的情景,慢慢耗尽恒星核中的氢,最后变成氦元素,以此为聚变提供燃料。奇怪的是NGC2818位于一个稀疏的疏散星团NGC2818A内,该星团位于南方的罗盘座内,距离我们大约1万光年远。因为在仅仅数百万年之后,疏散星团开始消散,可能因为这个星团异常的年老,其内的一颗恒星已经演变到了行星状星云阶段。在这个恒星团的距离上,行星状星云NGC2818大小约4光年。这张哈勃影像是一组通过窄带滤波器拍摄到影像合成,影像中显现了由氮,氢,氧原子放射出的色彩,分别是红色,绿色和蓝色辉光。

[ 本帖最后由 jadiyd 于 2009-1-22 19:21 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
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 楼主| 发表于 2009-01-23 17:55 | 显示全部楼层
2009 January 23
                                          
                                                                                                                          Globular Cluster NGC 2419
Credit & Copyright: Richard Hammar Explanation: Of three objects prominent in this thoughtful telescopic image, a view toward the stealthy constellation Lynx, two (the spiky ones) are nearby stars. The third is the remote globular star cluster NGC 2419, at distance of nearly 300,000 light-years. NGC 2419 is sometimes called "the Intergalactic Wanderer", an appropriate title considering that the distance to the Milky Way's satellite galaxy, the Large Magellanic Cloud, is only about 160,000 light-years. Roughly similar to other large globular star clusters like Omega Centauri, NGC 2419 is itself intrinsically bright, but appears faint because it is so far away. NGC 2419 may really have an extragalactic origin as, for example, the remains of a small galaxy captured and disrupted by the Milky Way. But its extreme distance makes it difficult to study and compare its properties with other globular clusters that roam the halo of our Milky Way galaxy.

[ 本帖最后由 jadiyd 于 2009-1-23 18:09 编辑 ]
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 楼主| 发表于 2009-01-24 18:47 | 显示全部楼层
2009 January 24
The Bubble Nebula
Credit & Copyright: Kent Wood Explanation: Blown by the wind from a massive star, this interstellar apparition has a surprisingly familiar shape. Cataloged as NGC 7635, it is also known simply as The Bubble Nebula. This colorful telescopic image includes a long exposure through a hydrogen alpha filter to reveal details of the cosmic bubble and its environment. Although it looks delicate, the 10 light-year diameter bubble offers evidence of violent processes at work. Above and right of the Bubble's center is a bright, hot, Wolf-Rayet star with a mass 10 to 20 times that of the Sun. A fierce stellar wind and intense radiation from the star has blasted out the structure of glowing gas against denser material in a surrounding molecular cloud. The intriguing Bubble Nebula lies a mere 11,000 light-years away toward the boastful constellation Cassiopeia.
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 楼主| 发表于 2009-01-25 19:56 | 显示全部楼层
2009 January 25

Annular Eclipse: The Ring of Fire
Credit & Copyright: Dennis L. Mammana (TWAN) Explanation: Tomorrow, a few lucky people may see a "ring of fire." That's a name for the central view of an annular eclipse of the Sun by the Moon. At the peak of this eclipse, the middle of the Sun will appear to be missing and the dark Moon will appear to be surrounded by the bright Sun. This will only be visible, however, from a path that crosses the southern Indian Ocean. From more populated locations, southern Africa and parts of Australia, most of the Moon will only appear to take a bite out the Sun. Remember to never look directly at the Sun even during an eclipse. An annular eclipse occurs instead of a total eclipse when the Moon is on the far part of its elliptical orbit around the Earth. The next annular eclipse of the Sun will take place in 2010 January, although a total solar eclipse will occur this July. Pictured above, a spectacular annular eclipse was photographed behind palm trees on 1992 January.
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 楼主| 发表于 2009-01-26 19:49 | 显示全部楼层
2009 January 26
  
AE Aurigae and the Flaming Star Nebula
Credit & Copyright: [email=%20jorge_garcia_nto%20at%20yahoo%20dot%20es]Jorge Garcia[/email] Explanation: Is star AE Aurigae on fire? No. Even though AE Aurigae is named the flaming star, the surrounding nebula IC 405 is named the Flaming Star Nebula, and the region appears to harbor red smoke, there is no fire. Fire, typically defined as the rapid molecular acquisition of oxygen, happens only when sufficient oxygen is present and is not important in such high-energy, low-oxygen environments such as stars. The material that appears as smoke is mostly interstellar hydrogen, but does contain smoke-like dark filaments of carbon-rich dust grains. The bright star AE Aurigae, visible near the nebula center, is so hot it is blue, emitting light so energetic it knocks electrons away from surrounding gas. When a proton recaptures an electron, red light is frequently emitted, as seen in the surrounding emission nebula. Pictured above, the Flaming Star nebula lies about 1,500 light years distant, spans about 5 light years, and is visible with a small telescope toward the constellation of the Charioteer (Auriga).
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 楼主| 发表于 2009-01-27 22:28 | 显示全部楼层
2009 January 27

The Milky Way Over Mauna Kea
Credit & Copyright: Wally Pacholka (TWAN) Explanation: Have you ever seen the band of our Milky Way Galaxy? In a clear sky from a dark location at the right time, a faint band of light becomes visible across the sky. Soon after your eyes become dark adapted, you might spot the band for the first time. It may then become obvious. Then spectacular. One reason for a growing astonishment might be the realization that this fuzzy swath contains billions of stars and is the disk of our very own spiral galaxy. Since we are inside this disk, the band appears to encircle the Earth. Visible in the above image, high above in the night sky, the band of the Milky Way Galaxy arcs. The bright spot just below the band is the planet Jupiter. In the foreground lies the moonlit caldera of the volcano Haleakala, located on the island of Maui in Hawaii, USA. A close look near the horizon will reveal light clouds and the dark but enormous Mauna Kea volcano on the Big Island of Hawaii. If you have never seen the Milky Way band or recognized the planet Jupiter, this year may be your chance. Because 2009 is the International Year of Astronomy, an opportunity to look through a window that peers deep into the universe may be coming to a location near you.
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 楼主| 发表于 2009-01-28 19:40 | 显示全部楼层
2009 January 28

A Partial Eclipse Over Manila Bay
Credit & Copyright: Armando Lee (Astron. League Philippines), 100 Hours of Astronomy (IYA2009)
Explanation: What's happened to the setting Sun? An eclipse! Two days ago, the Moon eclipsed part of the Sun as visible from parts of Africa, Australia, and Asia. In particular the above image, taken from the Mall of Asia seawall, caught a partially eclipsed Sun setting over Manila Bay in the Philippines. Piers are visible in silhouette in the foreground. Eclipse chasers and well placed sky enthusiasts captured many other interesting and artistic images of the year's only annular solar eclipse, including movies, eclipse shadow arrays, and rings of fire. Another partial solar eclipse will be visible from the Philippines in July. That event, however, will likely be better remembered as a total solar eclipse visible to those occupying a long thin swath of Earth that starts in India and extends through China into the Pacific Ocean.
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 楼主| 发表于 2009-01-30 14:43 | 显示全部楼层
2009 January 30

NGC 1579: Trifid of the North
Credit & Copyright: Don Goldman Explanation: Colorful NGC 1579 resembles the better known Trifid Nebula, but lies much farther north in planet Earth's sky, in the heroic constellation Perseus. About 2,100 light-years away and 3 light-years across, NGC 1579 is, like the Trifid, a study in contrasting blue and red colors, with dark dust lanes prominent in the nebula's central regions. In both regions, dust reflects starlight to produce beautiful blue reflection nebulae. But unlike the Trifid, in NGC 1579 the reddish glow is not emission from clouds of glowing hydrogen gas excited by ultraviolet light from a nearby hot star. Instead, the dust in NGC 1579 drastically diminishes, reddens, and scatters the light from an embedded, extremely young, massive star, itself is strong emitter of the characteristic red hydrogen alpha light.
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 楼主| 发表于 2009-01-31 16:56 | 显示全部楼层
2009 January 31

Simeis 147: Supernova Remnant
Credit & Copyright: J-P Mets&auml;vainio (Astro Anarchy)
Explanation: It's easy to get lost following the intricate filaments in this detailed image of faint supernova remnant Simeis 147. Also cataloged as Sh2-240 and seen towards the constellation Taurus, it covers nearly 3 degrees (6 full moons) on the sky. That corresponds to a width of 150 light-years at the stellar debris cloud's estimated distance of 3,000 light-years. The remarkable narrow-band composite image in the Hubble color palette includes emission from hydrogen, sulfur, and oxygen atoms tracing regions of shocked, glowing gas. This supernova remnant has an estimated age of about 40,000 years - meaning light from the massive stellar explosion first reached Earth 40,000 years ago. But this expanding remnant is not the only aftermath. The cosmic catastrophe also left behind a spinning neutron star or pulsar, all that remains of the original star's core.
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
头像被屏蔽
发表于 2009-02-01 02:04 | 显示全部楼层
这么好的贴子这么冷清?大家都不来审美啊?;P ;P
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 楼主| 发表于 2009-02-01 14:09 | 显示全部楼层
2009 February 1

Auroral Corona Over Norway
Credit & Copyright: Frank Andreassen (nettfoto.no)
Explanation: Higher than highest communications tower, higher than highest mountain, higher than highest airplane, lies the realm of the aurora. Auroras rarely reach below 60 kilometers, and can range up to 1000 kilometers. Aurora light results from energetic electrons and protons striking molecules in the Earth's atmosphere. Frequently, when viewed from space, a complete aurora will appear as a circle around one of the Earth's magnetic poles. This particularly rare purple auroral corona occurred in 2004 high above Harstad, Norway.
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 楼主| 发表于 2009-02-03 11:42 | 显示全部楼层
2009 February 2

Comet Lulin Approaches
Credit & Copyright: Paolo Candy (Cimini Astronomical Observatory)
Explanation: How bright will Comet Lulin become? No one knows for sure. Although it is notoriously difficult to accurately predict the brightness of newly discovered comets, Comet Lulin could well become visible to the unaided eye later this month. As Comet Lulin moves into the northern sky in mid February to rise around midnight, it should at least be spotted by comet watchers with binoculars and a good sky chart. Tracking observations indicate that the comet officially designated C/2007 N3 (Lulin) has now swung by the Sun and is approaching Earth on a trajectory that will bring it within half the Earth-Sun distance in late February. Comet Lulin's orbit indicates that this is likely the comet's first trip into the inner Solar System. The comet was discovered by Quanzhi Ye of Sun Yat-sen University on images obtained by Chi-Sheng Lin at the Lu-Lin Observatory of National Central University. In this picture, taken from Italy last Friday, are Comet Lulin's coma and tails, one tail pointing away from the Sun, and an anti-tail -- dust that trails the comet in its orbit and may appear to point toward the Sun.
彗星Lulin正在靠近 
说明:彗星Lulin将会变得多亮?没有人能知道。尽管很难精确预计新发现彗星的亮度,但是彗星Lulin在本月末将会肉眼可见。在二月中旬,到时彗星Lulin运动到北部天空,并在午夜时分升起,对于利用双筒望远镜和较好星图的彗星观测者来说,至少能看到一个星点。经过追踪观测彗星正式被命名C/2007 N3 (Lulin),正绕太阳运转,在抛物线的轨道上慢慢靠近地球,到二月末,它将距离地球一半日地距离彗星Lulin的轨道说明了这可能是这颗彗星第一次进入太阳系内部。该彗星是由中山大学的叶泉志以及台湾国立中央大学内的Lulin观测台的林启生拍摄发现。星期五在意大利拍摄的这张影像里,可以看到彗星Lulin的彗发和彗尾,一条彗尾指离太阳的方向以及一条逆向彗尾――该彗尾沿着彗星的轨道留下尘埃,并且指向太阳。
影像提供及版权:Paolo Candy (Cimini Astronomical Observatory)
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 楼主| 发表于 2009-02-03 19:53 | 显示全部楼层
2009 February 3

Lenticular Clouds Above Washington
Credit & Copyright: [email=%20Ti2Di%20at%20q%20dot%20com]Tim Thompson[/email]
Explanation: Are those UFOs near that mountain? No -- they are multilayered lenticular clouds. Moist air forced to flow upward around mountain tops can create lenticular clouds. Water droplets condense from moist air cooled below the dew point, and clouds are opaque groups of water droplets. Waves in the air that would normally be seen horizontally can then be seen vertically, by the different levels where clouds form. On some days the city of Seattle, Washington, USA, is treated to an usual sky show when lenticular clouds form near Mt. Rainier, a large mountain that looms just under 100 kilometers southeast of the city. This image of a spectacular cluster of lenticular clouds was taken last December.
华盛顿上空的荚状云

影像提供及版权[email=%20Ti2Di%20at%20q%20dot%20com]Tim Thompson[/email]
说明:这是UFO接近了山峰吗?不是,它们是层层叠叠的荚状云。被迫向山顶流动的潮湿空气会形成荚状云。湿空气因抬升而降温至露点温度,凝结成水滴,我们所见不透明的,就是一团团水滴所造成的。一般来说,气流的水平运动大于垂直运动,这些形成的云分别处在不同高度。在美国华盛顿西雅图的某些日子里,在瑞尼尔山附近经常发现天空中有许多的荚状云。瑞尼尔山位于西雅图东南方100公里处。上面这张壮观的荚状云团影像拍摄于去年12月。


[ 本帖最后由 jadiyd 于 2009-2-4 22:54 编辑 ]
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 楼主| 发表于 2009-02-04 22:55 | 显示全部楼层
2009 February 4

A Dangerous Summer on HD 80606b
Illustration Credit: D. Kasen (et al.UCSC), NASA, JPL-Caltech
Explanation: On the distant planet HD 80606b, summers might be dangerous. Hypothetic life forms floating in HD 080606b's atmosphere or lurking on one of its (presently hypothetical) moons might fear the 1,500 Kelvin summer heat, which is hot enough not only to melt lead but also nickel. Although summers are defined for Earth by the daily amount of sunlight, summers on HD 80606b are more greatly influenced by how close the planet gets to its parent star. HD 80606b, about 200 light years distant, has the most elliptical orbit of any planet yet discovered. In comparison to the Solar System, the distance to its parent star would range from outside the orbit of Venus to well inside the orbit of Mercury. In this sequence, the night side of HD 80606b is computer simulated as it might glow in infrared light in nearly daily intervals as it passed the closest point in its 111-day orbit around its parent star. The simulation is based on infrared data taken in late 2007 by the Spitzer Space Telescope.
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 楼主| 发表于 2009-02-05 20:29 | 显示全部楼层
2009 February 5

NGC 604: X-rays from a Giant Stellar Nursery
Credit: X-ray: NASA / CXC / R. Tuellmann (Harvard-Smithsonian CfA) et al.;
Optical: NASA/AURA/STScI
Explanation: Some 3 million light-years distant in nearby spiral galaxy M33, giant stellar nursery NGC 604 is about 1,300 light-years across, or nearly 100 times the size of the Orion Nebula. In fact, among the star forming regions within the Local Group of galaxies, NGC 604 is second in size only to 30 Doradus, also known as the Tarantula Nebula in the Large Magellanic Cloud. This space-age color composite of X-ray data (in blue hues) from the Chandra Observatory, and Hubble optical data shows that NGC 604's cavernous bubbles and cavities are filled with a hot, tenuous, X-ray emitting gas. Intriguingly, NGC 604 itself is divided by a wall of relatively cool gas. On the western (right) side of the nebula, measurements indicate that material is likely heated to X-ray temperatures by the energetic winds from a cluster of about 200 young, massive stars. On the eastern side the X-ray filled cavities seem to be older, suggesting supernova explosions from the end of massive star evolution contribute to their formation.
NGC 604: 巨大的恒星形成区域发射出的X射线

影像提供:X-ray: NASA / CXC / R. Tuellmann (Harvard-Smithsonian CfA) et al.;

光学:NASA/AURA/STScI
说明:在距离约300万光远的旋涡星系M33内,巨大的恒星形成区域NGC604大小约1,300光年,相当于猎户座星云大小的100倍。事实上,在本地星系团内众多恒星形成区域中,NGC604是仅次于剑鱼座30的第二大恒星形成区域,剑鱼座30就是大麦哲伦星云内的蜘蛛星云。这张太空时代彩色合成影像是由钱德拉观测卫星拍摄到的X射线数据(蓝色辉光),与哈勃光学数据结合,显示了NGC604内巨大的气泡和空洞,期内充满了炽热、纤细的由X射线激发出的气体。令人好奇的是,NGC604本身被一道相对较冷的气体分隔了。在星云的西侧(右侧),经过测量表明其内的物质被一团大约具有200颗年轻的大质量恒星吹出的高能风加热,放射出X射线。在星云东侧,充满X射线的泡泡,看上去似乎较年老,可能与大质量恒星在演变的最后阶段发生超新星爆炸有关。
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 楼主| 发表于 2009-02-07 00:20 | 显示全部楼层
2009 February 6

Space Station in the Moon
Credit & Copyright: [email=eric%20dot%20zbinden%20at%20gmail%20dot%20com]Eric J. Zbinden[/email]
Explanation: On February 2nd, a first quarter Moon shone in planet Earth's early evening sky. As seen from a location on the US west coast near Mt. Hamilton, California, the International Space Station also arched above the horizon, crossing in front of the Moon's sunlit surface. The space station's transit lasted 0.49 seconds. This sharp exposure, a well-timed telescopic image, recorded the space station during the transit against the background of the Moon's smooth Mare Serenitatis (Sea of Serenity). The orbital outpost was traveling northwest to southeast (from 2 o'clock to 8 o'clock) at a range of 389 kilometers or about 230 miles. Of course, the Moon itself was 1,000 times farther away. In the remarkable photo, the glinting station also offers a hint of the bluish reflection of earthlight.
月球上的国际空间站
影像提供及版权:Eric J. Zbinden
说明:2月2日,一轮上弦月闪烁在地球夜晚的天空中。从美国西海岸加利福尼亚州汉密尔顿山附近位置看去,国际空间站在地平线上划过一道弧线,从月球被阳光照亮面前方通过。国际空间站凌月持续时间才0.49秒。在这张清晰的望远镜影像中,拍摄到了空间站在凌月期间,背景是月球表面平滑的澄海。这一太空前哨站从西北向东南运动(从2点位置运动到8点),其距离地球约389公里/230英里。当然,月球本身距离我们要远1,000倍。在这张显著的影像里,闪亮的空间站还反射了地球反照光的蓝色辉光。
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 楼主| 发表于 2009-02-07 15:29 | 显示全部楼层
2009 February 7

Comet Lulin Tails
Credit & Copyright: [email=%20jbrimaco%20at%20bigpond.net.au]Joseph Brimacombe[/email]
Explanation: Sweeping through the inner solar system, Comet Lulin is easily visible in both northern and southern hemispheres with binoculars or a small telescope. Recent changes in Lulin's lovely greenish coma and tails are featured in this two panel comparison of images taken on January 31st (top) and February 4th. Taken from dark New Mexico Skies, the images span over 2 degrees. In both views the comet sports an apparent antitail at the left -- the comet's dust tail appearing almost edge on from an earth-based perspective as it trails behind in Lulin's orbit. Extending to the right of the coma, away from the Sun, is the beautiful ion tail. Remarkably, as captured in the bottom panel, Comet Lulin's ion tail became disconnected on February 4, likely buffeted and torn away by magnetic fields in the solar wind. In 2007 NASA satellites recorded a similar disconnection event for Comet Encke. Don't worry, though. Comet tails can grow back.
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发表于 2009-02-08 19:55 | 显示全部楼层

正扫过太阳系内围的鹿林彗星`

现在正扫过太阳系内围的鹿林彗星,在北半球和南半球都是一颗用双筒或小望远镜就能轻易看见的天体。上面这两幅分别拍摄于1月31日和2月4日的影像,呈现鹿林彗星美丽绿色彗核及彗尾的变化。这些在美国新墨西哥州黝黑夜空下所拍摄的影像,涵盖了大约二度的天区。在这两幅影像中,鹿林彗星皆有向左延伸的反向彗尾,而伸展在彗星轨道上的尘尾几乎是侧对着我们。在彗核的右侧,也可见到一道指离太阳的美丽离子尾。如下幅在2月4日拍摄的影像所示,鹿林彗星的离子尾可能在受到太阳风内磁场的拉扯,而发生很有趣的剥离现象。在2007年,美国航天总署的数颗卫星,也在恩克彗星发现类似的彗尾断裂现象。
1月31日鹿林彗星.jpg
2月4日鹿林彗星.jpg
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发表于 2009-02-08 19:57 | 显示全部楼层
鹿林彗星位置图及升没时间表```````````
鹿林彗星位置表.jpg
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发表于 2009-02-08 19:58 | 显示全部楼层
鹿林彗星位置图````````````````
二月中旬.jpg
二月下旬.jpg
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发表于 2009-02-08 20:18 | 显示全部楼层
好漂亮的啊:D
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 楼主| 发表于 2009-02-09 13:59 | 显示全部楼层
2009 February 9

Anemic Galaxy NGC 4921 at the Edge
Credit: NASA, ESA, K. Cook (LLNL)
Explanation: How far away is spiral galaxy NGC 4921? Although presently estimated to be about 320 million light years distant, a more precise determination could be coupled with its known recession speed to help humanity better calibrate the expansion rate of the entire visible universe. Toward this goal, this image was taken by the Hubble Space Telescope in order to help identify key stellar distance markers know as Cepheid variable stars. Since NGC 4921 is a member of the Coma Cluster of Galaxies, refining its distance would also allow a better distance determination to one of the largest NGC 4921 has been informally dubbed anemic because of its low rate of star formation and low surface brightness. The remarkably sharp image was made with Hubble's Advanced Camera for Surveys, currently in need of repair. Visible in the image are, from the center, a bright nucleus, a bright central bar, a prominent ring of dark dust, blue clusters of recently formed stars, several smaller companion galaxies, unrelated galaxies in the far distant universe, and unrelated stars in our Milky Way Galaxy.
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 楼主| 发表于 2009-02-10 15:26 | 显示全部楼层
2009 February 10

Orion's Belt
Credit & Copyright: Martin Mutti, Astronomical Image Data Archive
Explanation: Alnitak, Alnilam, and Mintaka, are the bright bluish stars from east to west (left to right) along the diagonal in this gorgeous cosmic vista. Otherwise known as the Belt of Orion, these three blue supergiant stars are hotter and much more massive than the Sun. They lie about 1,500 light-years away, born of Orion's well-studied interstellar clouds. In fact, clouds of gas and dust adrift in this region have intriguing and some surprisingly familiar shapes, including the dark Horsehead Nebula and Flame Nebula near Alnitak at the lower left. The famous Orion Nebula itself lies off the bottom of this star field that covers about 4.5x3.5 degrees on the sky. This image was taken last month with a digital camera attached to a small telescope in Switzerland, and better matches human color perception than a more detailed composite taken over 15 years ago.
猎户座腰带

影像提供及版权:[email=%20martin.mutti%20at%20bluewin%20dot%20ch]Martin Mutti[/email], Astronomical Image Data Archive
说明:在这张绚丽的宇宙影像里,参宿一参宿二参宿三是从东往西(左至右)对角线上三颗明亮的蓝色恒星。另外,这三颗蓝色巨星还被称为猎户座腰带,它们比太阳温度高,质量比太阳大。它们距离我们大约1,500光年,诞生于猎户座星云内。事实上,漂浮在该区域内的气体尘埃云形成了有趣而又令人惊奇的熟悉形状,包括参宿一左下角的黑色马头星云和火焰星云。著名的猎户座星云本身位于这张星场下方外,这片区域在天空中覆盖大约4.5*3.5度。这张影像是上个月用一台数码相机通过一架小望远镜拍摄,地点位于瑞士,这张影像比15年前拍摄的更为详细的合成影像更适合人类的色彩视觉

[ 本帖最后由 jadiyd 于 2009-2-11 10:27 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-02-11 13:18 | 显示全部楼层
2009 February 11

Orion's Belt Continued
Credit & Copyright: [email=asmallbone%20at%20earthlink%20dot%20net]Alan Smallbone[/email]
Explanation: Yesterday's skyscape featured Alnitak, Alnilam, and Mintaka, the stars of Orion's Belt. Today's also presents the easternmost belt star, Alnitak, at the bottom right of the field, surrounded by the well-known Horsehead and Flame nebulae. But this view sweeps farther to the east (left) and north (top) detailing subtler cosmic clouds of gas and dust scattered through the fertile, nebula rich region. The scene is anchored at the top left by the eerie blue glow and ominous dark dust lanes of reflection nebula M78. Like the Horsehead, the Flame, and the Orion Nebula itself, M78 is a readily visible part of the large Orion Molecular Cloud complex some 1,500 light-years distant.
猎户座腰带续
影像提供及版权[email=asmallbone%20at%20earthlink%20dot%20net]Alan Smallbone[/email]
说明:昨天的每日一图是参宿一,参宿二和参宿三,也就是猎户座腰带上的三颗恒星。今天还将会展现腰带恒星最东侧的恒星参宿一,其位于影像的右侧底部,由著名的马头星云焰火星云围绕。但是这张影像从东(左侧)到北(顶部)扫过了更远的区域,细致的宇宙气体尘埃云分散在星云富集的区域内。影像顶部左侧被一片可怕的蓝色辉光以及反射星云M78黑暗尘埃带占据着。类似马头星云、焰火星云以及猎户座星云一样,M78也是距离我们1,500光年远猎户座巨大分子云的一个可见部分。


[ 本帖最后由 jadiyd 于 2009-2-12 23:30 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
CDer:000024255
 楼主| 发表于 2009-02-12 13:08 | 显示全部楼层
2009 February 12

Zodiacal Light Vs. Milky Way
Credit & Copyright: Daniel López, IAC
Explanation: Two fundamental planes of planet Earth's sky compete for attention in this remarkable wide-angle vista, recorded on January 23rd. Arcing above the horizon and into the night at the left is a beautiful band of Zodiacal Light - sunlight scattered by dust in the solar system's ecliptic plane. Its opponent on the right is composed of the faint stars, dust clouds, and nebulae along the plane of our Milky Way Galaxy. Both celestial bands stand above the domes and towers of the Teide Observatory on the island of Tenerife. Also out to play in the pristine, dark skies over the Canary Islands, are brilliant Venus (lower left), the distant Andromeda Galaxy (near center), and the lovely Pleiades star cluster (top center). Of course, seasoned skygazers might even spot M33, the California Nebula, IC1805, and the double star cluster of Perseus. (Need some help? Just slide your cursor over the picture.)
黄道光VS.银河

影像提供及版权Daniel López, IAC

说明:在这张123拍摄到的壮观广角影像里,明显能注意到地球天空中有两道平面吸引人的注意。在地平线上空,左侧有一道伸向夜空的美丽光带就是黄道光太阳光被太阳系黄道面内的尘埃散射后形成。而在对面右侧是由昏暗恒星,尘埃云和星云组成的银河系盘面。两道光带都位于泰德峰天文台圆顶和高塔上空,该天文台位于西班牙特内里费岛上。影像中还突出了加那利群岛上质朴而又黑暗的天空,明亮的金星(左下方),遥远的仙女座星系(位于中央),以及可爱的昴星团(顶部中央)。当然,有经验的天文观测者还会注意到M33加利福尼亚星云IC1805以及英仙座内的双星团。(需要一些帮助吗?把你的鼠标放到图片上吧)

[ 本帖最后由 jadiyd 于 2009-2-12 23:30 编辑 ]
最具影响力军事论坛-超级大本营军事论坛欢迎你!超然物外,有容乃大。
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