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Kata Tjuta 奧加斯 (28/6/2003)
我一直都好想好想去澳洲旅行，因為很想很想看看南半球的星空，和這塊石。經常聽到人說外國的月亮特別漂亮，特別圓，我想這會是對的－當你跟自己說多幾篇，到外國時，你或許真會覺得外國的月亮特別不同；我想說的，是南半球的星空果真漂亮些，暫不提那些討厭的城市燈光，南方的天空有著壯觀的大小麥哲倫雲（兩個星系來的），南十字座等，令南天格外動人。不信？到南半球看看就知我沒有騙你。白天一定要到著名的艾爾斯岩和奧加斯看看，那裏的風景就像幅畫一樣美。

Caption:: I have been dreaming for travelling to Australia, to look at its night sky and also, visit the Ayers Rock. The Southern sky is much beatiful than ours, as it contains the Magellan Clouds and the sourthern cross. In day time, you must go to the Ayers rock and Kata Tjuta to have a look.

Credit:: Frank Kletschkus

Globular Cluster M3 球狀星團 M3 (27/6/2003)
這個星團叫M3，是梅西爾星表的第3個成員，它位於獵犬座，是一個球狀星團。球狀星團星一個擁有數萬顆恆星的天體，這些恆星靠重力將幾十顆星維繫在一起，這些恆星相對地都十分年老。而M3就擁有五十萬顆恆星，有時真的很難想像那麼多的星怎樣聚在一起。

Caption:: A sixth magnitude globular cluster in the constellation Canes Venatici, this ball of 500,000 stars is approximately 160 light years across and 100,000 light years from Earth. This image of M3 is a combination of a B-band image and a Z-band image (Z is approximately from 8500 to 9500 A) taken on March 22, 2003, at the WIYN 3.5-meter telescope in 0.4 arcsec seeing. The image was taken with the WIYN Tip-Tilt Module (WTTM), and will be used to study the variable stars in the cluster.

Credit:: S. Kafka and K. Honeycutt Indiana University/ WIYN/ NOAO/ NSF

Albatross 信天翁 (26/6/2003)
不知道為什麼，世界上大部份的動物都是要雄性去追求雌性的(人類當然是)。所以各種動物會用不同不同的方形去奪得另一半的芳心，跳舞就是其中一種。看多些動物紀錄片，或會見過男的信天翁在女的信天翁面前大跳求偶舞，平心而論，牠跳得確實不錯，不過單靠跳舞好不好看來選擇伴侶，會否兒戲了些？(笑)

Caption:: A male albatross streches his wings and lifts his break to the Galapagos sky in an ancient courtship dance. When the attentive female chooses from among the flock, she'll bow and flap in reply.

Credit:: Graham Robertson

Gamma-ray Burst 伽瑪射線暴 (25/6/2003)
這張圖是畫的，不是影回來的，天文有不少東西都沒有實際觀測，所以要靠想像把一些情形畫出來。這張圖畫的是伽瑪射線暴，一個現在十分困擾著天文學家的天文現象，現在還未有一個很確切的理論解釋它的形因。在太空中平均每天可以探測到一段出現一瞬間(通常少於一秒)的高能量伽瑪射線，而計算顯示這秒鐘的能量大約有一整顆恆星那麼大，天文學家稱此為伽瑪射線暴。最近幾年，很多證據把這種現象與恆星死亡時的超新星爆發連上關係，圖中就是畫出一顆恆星於超新星爆發時發出伽瑪射線噴流。

Caption:: This is a still image from a computer animation of a gamma-ray burst destroying a star. This blue Wolf-Rayet star -- containing about 10 solar masses worth of helium, oxygen and heavier elements -- has depleted its nuclear fuel. This has triggered a Type Ic supernova / gamma-ray burst event. The core of the star has collapsed, without the star's outer part knowing. A black hole forms inside surrounded by a disk of accreting matter, and, within a few seconds, launched a jet of matter away from the black hole that ultimately made the gamma-ray burst. Here we see the jet (white plume) breaking through the outer shell of the star, about nine seconds after its creation. The jet of matter, in conjunction with vigorous winds of newly forged radioactive nickel-56 blowing off the disk inside, shatters the star within seconds. This shattering represents the supernova event.

Credit:: NASA / SkyWorks Digital

Startrails II 星流跡 II (24/6/2003)
之前介紹過星流跡是甚麼，今次不再多說了。今次這張是一張南天的星流跡。甚麼？星流跡也有分方向嗎？對，好像地球上有緯度一樣，天上的星也有不同的赤緯，也有天球的南極和北極。當你位於地球上的南半球影著張南天半球的星流跡，那就是一張南天的星流跡了。相中特別白的地方其實是銀河來的。攝影的地點是智利，嚗光時間為4.5小時。

Caption:: I have introduced star trails before, therefore this time I will not explain it again. This is a picture of southern sky star trails, just like our Earth have different latitude, our sky have different declination, and celestial north and south poles. If you stand at the Earth's southern hemisphere and taking a startrails with the southern celestial hemisphere, then it is an southern sky startrails. The white part in the image is the milky way. This pic was photographed in Chile with 4.5 hours exposure.

Credit:: Matt BenDaniel

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cheungszeleung@gmail.com LAST UPDATE: 29/6/2003