南方天空中的仙女座菌株
(原标题: Andromeda in Southern Skies)
2022-10-21
浏览次数: 18
从新西兰南部往北看，仙女座星系在地平线上的高度从来没有超过5度。随着南半球春天的到来，在九月下旬的午夜时分，仙女座在天空中是最高的。在一次30秒的曝光中，这张从约翰山天文台拍摄的长焦照片追踪了恒星，捕捉到了最近的大型螺旋星系，因为它刚刚爬过南岛南阿尔卑斯山崎岖的山峰。在前景中，星星反射在亚历山德里娜湖平静的水面上。仙女座星系也被称为M31，是梅西耶星表中最亮的天体之一，通常肉眼可以看到一个小小的、模糊的斑点。但这片清晰、黑暗的天空和长时间的曝光揭示了银河系在地球夜晚的更大范围，跨越了近6个满月。
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Looking north from southern New Zealand, the Andromeda Galaxy never gets more than about five degrees above the horizon. As spring comes to the southern hemisphere, in late September Andromeda is highest in the sky around midnight though. In a single 30 second exposure this telephoto image tracked the stars to capture the closest large spiral galaxy from Mount John Observatory as it climbed just over the rugged peaks of the south island's Southern Alps. In the foreground, stars are reflected in the still waters of Lake Alexandrina. Also known as M31, the Andromeda Galaxy is one of the brightest objects in the Messier catalog, usually visible to the unaided eye as a small, faint, fuzzy patch. But this clear, dark sky and long exposure reveal the galaxy's greater extent in planet Earth's night, spanning nearly 6 full moons.
© Ian Griffin