Copyright:Kiko Fairbairn
中文翻譯:
如果你住在北半球，你可能學會了如何在夜空中找到北星Polaris，它可以幫助你找到北方，並且大約標記了北天極。如果你住在南半球，雖然沒有明亮的星星來標記南天極，但你可以用南十字星來找到南方。這張圖片是在巴西的帕德雷·伯納多（Padre Bernardo）拍攝的，展示了2018年8月20日兩小時內星星圍繞似乎空的南天極的運行。每顆星星大約需要24小時才能圍繞天極轉一圈。帕德雷·伯納多位於巴西中部的塞拉多地區，這是一個熱帶草原，擁有豐富的生物多樣性。在南方的冬季，乾燥季節裡，常見的枯樹枝似乎支撐著這輪旋轉的星星。
原文:
If you live in the northern hemisphere, you may have learned how to locate the North Star, Polaris, in the night sky. It can be used to find north, and it approximately marks the northern celestial pole. If you live in the southern hemisphere, there is no bright star marking the southern celestial pole, but the Southern Cross can be used to find south. The featured image was taken in Padre Bernardo (GO), Brazil. It shows the apparent motion of the stars around the apparently empty southern celestial pole over 2 hours, on August 20, 2018. Each star takes about 24 hours to make a complete turn around the pole in the sky. Padre Bernardo is located in the Cerrado region, a tropical savanna that occupies most of central Brazil and supports rich biodiversity. The barren branch that apparently supports this sky wheel of rotating stars is a common sight there in the dry season during the southern winter.
來源:NASA每日圖片
