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Volcano 火山 (18/6/2003)
其實地球是一個很活躍的星球,比起太陽系的其他行星,她的地質活動頻繁,地震、板塊運動、火山爆發都是量度活躍度的指標。太空探索把人們的眼界擴闊到太陽系的其他行星,人類在那時候不斷發現其他行星上的火山,原來火山在其他行星並不罕有,但就行星來說,唯獨地球上的火山那麼活躍(然而,木衛一伊奧的火山活動更厲害)。在圖中,還可以看到星流跡。

Caption:: Earth is a very geologically active planet, the frequent earthquake, tectonic activities, volcano eruptions are all indicator of active geologic activities. Space missions allow us to explore the volcanoes around the solar system, however, none of the planet have comparable volcanic activities with Earth. (Indeed, Io, the satellite of Jupiter have extreme high volcanic activities). In this picture, you can also see the startails over the volcano.

Credit:: Superstock

Blue Ocean, blue sky 海天相接 (17/6/2003)
海,往往給人廣闊無邊,舒服而且安逸的感覺。有時偶爾乘下船,或者吹一吹海風,感覺很是舒服。有時候太忙了, 根本沒有空去走一倘,其實只要幻想一下,心情也會開朗一些(不信?你試一試吧),當你試幻想一下周圍都是海,汪洋一片,沒有山沒有陸地,畫面只餘下藍天和碧海,海天相接,這是如何的美好。你現在看到的這輻圖是在夏威夷影的。

Caption:: Sea, always giving people pleasant feelings. If you have time, get on a trip on the sea or go to the beach to touch the wind, which is very relaxing. This picture features the blue ocean and blue sky on Hawaii.

Credit:: Kennan Ward

Centaurus A 半人馬座A (16/6/2003)
這是位於半人馬座的半人馬座A星系,編號NGC 5128。它距離我們一千三百萬光年,是一個很特別的橢圓星系,在它前面有一堆不會發光的塵埃,所以看起來中間的地方黑了。

Caption:: This is a colour composite photo of the peculiar galaxy Centaurus A (NGC 5128), obtained with the Wide-Field Imager (WFI) camera at the ESO/MPG 2.2-m telescope on La Silla. It is based on a total of nine 3-min exposures made on March 25, 1999, through different broad-band optical filters (B(lue) - total exposure time 9 min - central wavelength 456 nm - here rendered as blue; V(isual) - 540 nm - 9 min - green; I(nfrared) - 784 nm - 9 min - red); it was prepared from files in the ESO Science Data Archive by ESO-astronomer Benoit Vandame. The elliptical shape and the central dust band, the imprint of a galaxy collision, are well visible.

Credit:: European Southern Observatory

MAP the Baby Universe 嬰孩宇宙地圖 (15/6/2003)
這就是我們的宇宙,於誕生後不久的宇宙。宇宙是由大爆炸而來,當時大爆炸的餘波還會以微波的形式殘存在宇宙中,叫作宇宙微波背景輻射,所以觀測到那些背景輻射就可以知道宇宙在剛誕生後的模樣。1999年發射的Wilkinson-MAP探測器,是一艘負責探測背景輻射探測船,這宇宙地圖就是它拍回來的,顯示著宇宙在當時的溫度分佈。

Caption:: The first detailed, all-sky picture of the infant universe. The WMAP image reveals 13 billion+ year old temperature fluctuations (shown as color differences) that correspond to the seeds that grew to become the galaxies. Encoded in the patterns are the answers to many age-old questions, such as the age and geometry of the Universe.

Related :: <<宇宙探索新世代>>

Credit:: NASA/WMAP Science Team

Hydra Cluster of Galaxies 長蛇座星系團 (14/6/2003)
由多個星系組成的,就是星系團。原來星系很喜歡走在一起的,它們會形成一個個的星系團,少的叫星系群,我們的銀河系所屬的叫本星系群。一個星系團擁有數千至數百個星系,一個星系群則包含十數個星系。圖中的是長蛇座星系團,當中包含了不同類型的星系。

Caption:: This splendid cluster of galaxies in Hydra is framed by two nearby, cool stars in our own Milky Way. The brightest is about 5th magnitude, visible to the unaided eye only under a dark sky; the second brightest is below naked-eye visibility. In contrast the galaxies appear featureless in all but the largest telescopes. The bluish, elongated galaxy is an edge-on spiral, NGC 3312. It has been distorted by interactions with its neighbours. They in turn have been affected, and the brightest of the two adjacent yellow elliptical galaxies (NGC 3311) has an assymetrical envelope, perhaps as a result of this encounter. It's hard to tell who is jostling who in a crowded group of galaxies such as this. Among the most interesting galaxies in the group are two faint spirals (NGC 3314) that are by chance aligned along the line of sight. They are seen a little to the left of the fainter star and directly below the brighter.

Credit:: Anglo-Australian Observatory


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cheungszeleung@gmail.com LAST UPDATE: 19/6/2003