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从太空看地球(酷图欣赏):国际空间站宇航员拍摄的天山山脉照片

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cz-9 发表于 2010-5-23 11:26 | 显示全部楼层


哈哈

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zhangwee 发表于 2010-6-3 20:07 | 显示全部楼层
亮光降临夜晚的意法边境:画面上都灵,里昂和马赛等大市区的灯光正好和水面的月光相互辉映;这副照片是ISS经过法国和比
利时上空时,宇航员朝东南方向倾斜拍摄的。from:http://earthobservatory.nasa.gov/IOTD/view.php?id=44124

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 楼主| hkhtg090201 发表于 2010-6-9 07:08 | 显示全部楼层
本帖最后由 hkhtg090201 于 2010-6-9 07:12 编辑




http://spacefellowship.com/wp-content/uploads/2010/06/Aurora_Borealis-610x400.jpg


从ISS看:加拿大魁北克撞击坑 和 北极极光:

Man-Made Aurora Will Help to Better Predict Space Weather
Published by Matt on Tue Jun 8, 2010 1:19 pm via: Universetoday
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NASA, JPL, Space weather, Aurora




New experiments that create a man-made aurora are helping researchers better understand how nitrogen in our atmosphere reacts when it is bombarded by the solar wind. Scientists from the Jet Propulsion Laboratory fired electrons of differing energies through a cloud of nitrogen gas to measure the ultraviolet light emitted by this collision, and the findings show our previous understanding of the processes that create the aurorae – which can also adversely affect orbiting satellites– may have been in error.

The Aurora Borealis or northern lights and the Manicouagan Impact Crater reservoir (foreground) in Quebec, Canada, were featured in this photograph taken by astronaut Donald R. Pettit, Expedition Six NASA ISS science officer, on board the International Space Station (ISS). Credit: NASA



For more than 25 years, our understanding of terrestrial space weather has been partly based on incorrect assumptions about how nitrogen — the most abundant gas in our atmosphere –reacts when it collides with electrons produced by energetic ultraviolet sunlight and solar wind.
The new research has found that well-trusted measurements published in a 1985 journal paper by researchers Ajello and Shemansky contain a significant experimental error, putting decades of space weather findings dependent on this work on unstable ground.
New technology has allowed the researchers to better create and control the collisions and avoid the analytical pitfalls that plagued the 1985 findings.
The new results from the team at JPL suggest that the intensity of a broad band of ultraviolet light emitted from the collision changes significantly less with bombarding electron energies than previously thought.
The researchers studied ultraviolet light within the so called ‘Lyman-Birge-Hopfield’ (LBH) band to better understand the physical and chemical processes occurring in our upper atmosphere and in near-Earth space.
“Our measurement of LBH energy-dependence differs significantly from widely accepted results published 25 years ago,” said Dr. Charles Patrick Malone from JPL. “Aeronomers can now turn the experiment around and apply it to atmospheric studies and determine what kind of collisions produce the observed light.”
In addition to helping researchers to better understand space weather, which can help protecting the ever-growing population of satellites in Earth orbit, the new findings will also help further our understanding of phenomena like Aurora Borealis (the Northern Lights) and similarly the Aurora Australis (Southern Lights), which are caused by collisional processes involving solar wind particles exciting terrestrial oxygen and nitrogen particles at the North and South Pole.
The researchers are hopeful that their findings will also assist the Cassini project understand happenings on Saturn’s largest moon, Titan, as LBH emissions have been detected by the orbiting robotic spacecraft.
 楼主| hkhtg090201 发表于 2010-6-9 07:09 | 显示全部楼层
图片上传又不正常了,不知道是本地问题,还是远程问题。
 楼主| hkhtg090201 发表于 2010-6-22 08:36 | 显示全部楼层
本帖最后由 hkhtg090201 于 2010-6-22 08:40 编辑

从国际空间站看 极光
Picture of the Day - An Aurora Seen from the International Space Station

Published by Matt on Mon Jun 21, 2010 1:16 pm via: Earth Observatory Share

     



   Among the views of Earth afforded astronauts aboard the International Space Station (ISS), surely one of the most spectacular is of the aurora.  These ever-shifting displays of colored ribbons, curtains, rays, and spots are most visible near the North (aurora borealis) and South (aurora australis) Poles as charged particles (ions) streaming from the Sun (the solar wind) interact with Earth’s magnetic field.


An Aurora Seen from the International Space Station. Credit: NASA

While aurora are generally only visible close to the poles, severe magnetic storms impacting the Earth’s magnetic field can shift them towards the equator. This striking aurora image was taken during a geomagnetic storm that was most likely caused by a coronal mass ejection from the Sun on May 24, 2010. The ISS was located over the Southern Indian Ocean at an altitude of 350 kilometers (220 miles), with the astronaut observer most likely looking towards Antarctica (not visible) and the South Pole.

The aurora has a sinuous ribbon shape that separates into discrete spots near the lower right corner of the image. While the dominant coloration of the aurora is green, there are faint suggestions of red left of image center. Dense cloud cover is dimly visible below the aurora. The curvature of the Earth’s horizon (the limb) is clearly visible, as is the faint blue line of the upper atmosphere directly above it (at image top center). Several stars appear as bright pinpoints against the blackness of space at image top right.

Auroras happen when ions in the solar wind collide with atoms of oxygen and nitrogen in the upper atmosphere. The atoms are excited by these collisions, and they typically emit light as they return to their original energy level. The light creates the aurora that we see. The most commonly observed color of aurora is green, caused by light emitted by excited oxygen atoms at wavelengths centered at 0.558 micrometers, or millionths of a meter. (Visible light is reflected from healthy (green) plant leaves at approximately the same wavelength.) Red aurora are generated by light emitted at a longer wavelength (0.630 micrometers), and other colors such as blue and purple are also sometimes observed.


http://spacefellowship.com/news/art21027/picture-of-the-day-an-aurora-seen-from-the-international-space-station.html
 楼主| hkhtg090201 发表于 2010-6-22 08:39 | 显示全部楼层
本帖最后由 hkhtg090201 于 2010-6-23 03:50 编辑

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 楼主| hkhtg090201 发表于 2010-6-22 12:01 | 显示全部楼层
空间站经过印度洋 宇航员拍下蛇形南极极光


    5月29日,当国际空间站经过印度洋上空时,国际空间站“远征23队”宇航员捕捉到了太空中美丽的蛇形南极光画面。

    据国外媒体报道,国际空间站上的宇航员拍到了南极光的绝美画面,照片中,在地平线的映衬下,南极光就像绿色缎带一样,在太空蜿蜒前行。

    极光在北极和南极附近看得最为清楚。捕捉到这张照片的当天,国际空间站以距地面350公里的高度从南印度洋上空经过,让宇航员可以俯瞰南极洲和南极,同时以异乎寻常的视角展现了这种奇特的现象。密集的云团在极光下面看得并不太清楚。不过,蜿蜒曲折的地平线和高层大气微弱的蓝线条倒是清晰可见。

    极光是指由太阳带电的粒子碰撞地球两极的磁场,在天空中发生放电时所产生的现象。这张令人赞叹不已的极光照片拍摄时恰逢地磁暴,这场地磁暴可能是由5月24日太阳的日冕物质抛射引起的。高层大气中的氧原子和氮原子作为重归原始能态的一种方式,不断释放光子,形成我们所看到的极光。

    我们观测到的最常见的极光是绿色,由波长集中在0.5581微米(1微米相当于1米的一百万分之一)的氧原子释放的光子产生的。可见光则是由大概同样波长的健康(绿色)植物叶子反射形成的。红色极光由以0.63微米波长释放的光形成,偶尔,我们还能看到像蓝色、紫色等颜色的极光。虽然极光通常只有在靠近南北两极时才能看到,但冲击地球磁场的强磁暴也可以将这种现象的发生地转移到赤道。
 楼主| hkhtg090201 发表于 2010-7-8 20:15 | 显示全部楼层
美国《大西洋月刊》:从太空看不到中国长城(图)

2010年07月08日 15:08   来源:新华网



    这张照片由美国华裔宇航员焦立中于2004年11月24日从国际空间站上拍摄,是第一张得到确认的长城太空照(黄红前头所指的地方为长城)

    美国《大西洋月刊》网站7月5日文章原题:《从太空看长城:答案》

    我们在此要讨论的问题是:中国的长城是唯一能从太空看见的建筑,这点我们听过无数次,事实果真如此吗?能从太空看见长城吗?有什么简便方法可以不去太空就知道答案吗?

    答案总结:1.长城是唯一能从太空看到的建筑吗?远非如此。最容易发现的建筑是那些拥有完全规则的、也就是“非自然”轮廓的建筑,例如机场,被大型停车场环绕的购物中心或体育场,桥梁或是数英里长的堤坝,还有红光照耀下的埃及金字塔。

    2.能从太空看见长城吗?不能。或者说如果这里的“看见”指的是任何平常意义上的“看见”,那么答案很可能是不能。美国航天局(NASA)就这个问题作出了回答。

    3.可以不去太空就知道答案吗?可以,即使不去搜索航天局的答案。你以为“谷歌地球”从不同角度观看地球的能力是干什么用的?

    为什么不能从太空看到长城?航天局的权威人士卡姆利什·卢拉解释说:“实际上,在太空照片中很难辨别出中国的长城,因为建造长城所用材料的颜色和质地与周围土地非常相似。”

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 楼主| hkhtg090201 发表于 2010-7-8 20:34 | 显示全部楼层
一些重要的补充数据:

    长城确能在某种情况下看到,但这依赖于成像系统(即人眼)的角分辨率,一般人眼的角分辨率是1弧分(20/20视力),约等于0.0167度。测量分辨率需要考虑线耦——以长城为例,它是线型,但分辨它需要对比沿线的等宽。如果长城宽9米,可把18米作为眼睛能识别它的宽度。那么人眼最远能从什么高度看到18米宽的物体?根据数学公式距离L=18/(Sin 0.016 666 666 667),约等于62公里。而卫星轨道通常高度在500公里以上。
 楼主| hkhtg090201 发表于 2010-8-20 18:54 | 显示全部楼层
从信使号看地球和月亮

Earth and Moon from 114 Million Miles as seen by MESSENGER

Submitted by keithcowing on Thu, 08/19/2010 - 21:42. Planetary Science



In the lower left portion of this image, the Earth can be seen, as well as the much smaller Moon to Earth's right. When MESSENGER took this image, a distance of 183 million kilometers (114 million miles) separated the spacecraft and Earth. To provide context for this distance, the average separation between the Earth and the Sun is about 150 million kilometers (93 million miles). Though it is a beautiful, thought-provoking picture, viewing our planet from far away was not the main reason that the mission team planned the collection of this image. Instead, this image was acquired as part of MESSENGER's campaign to search for vulcanoids, small rocky objects that have been postulated to exist in orbits between Mercury and the Sun.

Though no vulcanoids have yet been detected, the MESSENGER spacecraft is in a unique position to look for smaller and fainter vulcanoids than has ever before been possible. MESSENGER's vulcanoid searches occur near perihelion passages, when the spacecraft's orbit brings it closest to the Sun. Today is another such perihelion, and MESSENGER is taking a new set of images to search for tiny asteroids lurking close to the Sun.

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turboram 发表于 2010-8-20 21:48 | 显示全部楼层
lz,日本月女神拍的地球高清照有吗?以前拿来当桌面,重装后找不到了.我觉得这张是拍得最漂亮的.
 楼主| hkhtg090201 发表于 2010-8-21 12:49 | 显示全部楼层
回复 31# turboram


    对不起,真没有
turboram 发表于 2010-8-21 19:00 | 显示全部楼层
回复 32# hkhtg090201


    谢谢
 楼主| hkhtg090201 发表于 2010-8-28 08:42 | 显示全部楼层

Terra卫星携带的先进星载热辐射与反射辐射计(ASTER)拍摄到了阿留申群岛上积雪覆盖的火山。

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changyuds 发表于 2010-10-24 16:24 | 显示全部楼层
壮观啊     收藏了
cslqc2010 发表于 2010-11-11 15:17 | 显示全部楼层
真想到太空上看地球,看宇宙,那种感觉多爽啊。看来我们只能做做梦了
 楼主| hkhtg090201 发表于 2010-11-24 12:22 | 显示全部楼层
本帖最后由 hkhtg090201 于 2010-11-24 20:11 编辑

太空俯瞰地球地标景点:从珠峰到迪拜塔(图)
http://tech.sina.com.cn/d/2010-11-24/09314902587.shtml



这是2009年11月21日拍到的世界最高峰——珠穆朗玛峰的全景图,海拔高度8844米

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 楼主| hkhtg090201 发表于 2010-12-27 20:55 | 显示全部楼层
本帖最后由 hkhtg090201 于 2010-12-28 11:47 编辑

科学: 灯火通明的中国城市
2010年12月27日


2010年12月14日,国际空间站上的宇航员在距地面650公里的太空轨道上,使用配有180毫米镜头的尼康数码相机,拍摄下了中国北方大城市——北京和天津,中间隔了一个廊坊——的太空照片。联合国估计,北京都市区2010年的人口总数大约在1200万,天津大约为700万,廊坊比较小,但也能从照片中分辨出来。

http://earthobservatory.nasa.gov/IOTD/view.php?id=48076


---------------------------------------
国际空间站宇航员从太空拍到:北京天津夜景(图)
2010年12月28日 09:26   来源:新浪   孝文




  北京时间12月28日消息,美国宇航局网站昨日公布了一张由国际空间站宇航局拍摄的太空照片,主要展现了中国城市北京与天津的夜景。
  在照片左上角,可以清楚地看到北京的输电网络。随着城区不断扩张,北京环路主干道也跟着向外扩展。天津是重要的贸易中心,与渤海湾沿岸的海港连成一片。这座城市处于京杭大运河沿线。京杭大运河是一条重要的人工河道,北起北京,南至浙江杭州,全长1103英里(约合1176公里)。
  照片中,位于北京和天津之间的廊坊市以及华北平原东北部几个规模更小的开发区同样清晰可见。而图中没有亮光的区域主要是农田,小麦和玉米是主要农作物。
  这张照片是由国际空间站第26长期考察组成员在2010年12月14日拍摄的。他们在拍照时,国际空间站正在韩国西部海岸附近的黄海上空飞行,离地大概391英里(约合630公里)。城区图像之所以看上去给人扁平的感觉,这是国际空间站的视角和距离的缘故。城市照明分布非常清楚,表明该地区当时几乎没有云或雾霾。


pS;根据计算,该是早晨拍摄的.

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 楼主| hkhtg090201 发表于 2010-12-27 21:05 | 显示全部楼层
顺便来个卫星地图对比.

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bd2mc 发表于 2010-12-27 21:14 | 显示全部楼层
莫斯科夜景太空照公布:灯火通明似巨型蛛网(图)
这是2009年11月21日拍到的世界最高峰——珠穆朗玛峰的全景图,海拔高度8844米
这两张比较震撼。很有价值!
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