Copyright:Kamil Fiedosiuk
中文翻譯:
你有沒有看過昴宿星團？即使你看過，也許你從來沒有見過這麼大又清晰的昴宿星團。它是天空中最著名的星團之一，即使在光污染非常嚴重的城市中，明亮的昴星也能用肉眼看到。但是，在一個黑暗的地方拍攝長時間曝光的照片，昴宿星團周圍的塵埃雲會變得非常明顯。這幅在波蘭Bory Tucholskie拍攝的18小時曝光的圖片，覆蓋的天空面積比滿月大上好幾倍。昴宿星團也被叫做七姐妹星和M45，距離我們約400光年，位於金牛座（Taurus）方向。有一個常見的傳說是，隨著這個星團被命名，其中一顆較亮的星星變暗了，至今只能用肉眼見到六顆姐妹星。不過，實際上，昴宿星團可見的星星數量可能多於或少於七顆，這取決於周圍天空的黑暗程度和觀察者的視力清晰度。
原文:
Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it as large and clear as this. Perhaps the most famous star cluster on the sky, the bright stars of the Pleiades can be seen with the unaided eye even from the depths of a light-polluted city. With a long exposure from a dark location, though, the dust cloud surrounding the Pleiades star cluster becomes very evident. The featured 18-hour exposure, taken from Bory Tucholskie, Poland covers a sky area several times the size of the full moon. Also known as the Seven Sisters and M45, the Pleiades lies about 400 light years away toward the constellation of the Bull (Taurus). A common legend with a modern twist is that one of the brighter stars faded since the cluster was named, leaving only six of the sister stars visible to the unaided eye. The actual number of Pleiades stars visible, however, may be more or less than seven, depending on the darkness of the surrounding sky and the clarity of the observer’s eyesight. Sky Surprise: What picture did APOD feature on your birthday? (after 1995)
來源:NASA每日圖片
