Sunset at North pole
It is named as HideawayIllustration Credit & Copyright: Inga Nielsen
Explanation: Is this a picture of a sunset from Earth's North Pole?Regardless of urban legends circulating the Internet, the answer is no.The above scene was drawn to be an imaginary celestial place that wouldbe calm and peaceful, and therefore titled Hideaway. The scene couldnot exist anywhere on the Earth because from the Earth, the Moon andthe Sun always have nearly the same angular size. This is particularlyapparent, for example, during solar eclipses. Still, the scene drawn isquite striking, and the crescent part of the "moon" shown isapproximately accurate given the location of the parent star. Inreality, the North Pole of Earth looks different. Starting earlier thismonth, the North Pole even has a web camera returning near-livepictures.
[[i] 本帖最後由 ilovepkany 於 2006-12-15 06:53 PM 編輯 [/i]] 咁多雞腸,唔明 好靚喎!聽就聽得多,未真正見過,係未叫曰全蝕呢? 日蝕是怎麼發生的呢?
那是因為月亮在通過太陽和地球之間,月亮一個不小心遮住了太陽,於是乎日蝕的現象便開始發生了…
日蝕必發生在朔日,即農曆初一。因該日適逢日月同經,同時太陽與月球位於黃道、白道交點附近(距離不超過十八度)才會發生日蝕。又因太陽比月球的直徑大四百倍,因此在月球的背光面會形成一個圓錐狀的黑影,這個錐影稱為本影,在地球上本影錐中的觀測者都見不到太陽,稱之為全蝕。
日蝕和月蝕現象,其實是一種十分單純的天文現象,當距離地球比較近的月球,月球是地球的衛星,圍繞著地球旋轉;同時,地球又帶著月球繞太陽旋轉。日蝕和月蝕就是由於這兩種運動所產生的結果。在規律的天體運行過程中,行經地球與太陽之間造成地球、月球與太陽,形成一直線的情況。這時候擋在太陽之前的月亮,便會遮住太陽的光芒,並在地球的表面上留下投射的陰影,而這段時間月球陰影經過的地區就會看到彷彿太陽被月球逐漸吞食的日蝕景象。
日蝕可分為三種:日偏蝕、日全蝕及日環蝕。 大開眼界,多謝樓主! thanks wa....我都好想去..
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