瑞典上空的绿色极光
(原标题: Green Aurora over Sweden)
2024-05-22
浏览次数: 13
它是明亮的，绿色的，横跨天空。这张引人注目的极光是2016年在瑞典Östersund郊外拍摄的。六个摄影场合并在一起，形成了近180度的特色全景。这个极光特别引人注目的方面包括它广阔的弧形形状和清晰的轮廓。在前景中可以看到Storsjön湖，而几个熟悉的星座和北极星可以通过远在背景中的极光看到。巧合的是，极光似乎避开了左下方可见的月球。在太阳日冕出现一个大洞之后的一天，极光出现了，这个洞允许特别高能的粒子流入太阳系。极光的绿色是由地球大气层中的氧原子与周围的电子重新结合引起的。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
查看原文解释
It was bright and green and stretched across the sky. This striking aurora display was captured in 2016 just outside of Östersund, Sweden. Six photographic fields were merged to create the featured panorama spanning almost 180 degrees. Particularly striking aspects of this aurora include its sweeping arc-like shape and its stark definition. Lake Storsjön is seen in the foreground, while several familiar constellations and the star Polaris are visible through the aurora, far in the background. Coincidently, the aurora appears to avoid the Moon visible on the lower left. The aurora appeared a day after a large hole opened in the Sun's corona, allowing particularly energetic particles to flow out into the Solar System. The green color of the aurora is caused by oxygen atoms recombining with ambient electrons high in the Earth's atmosphere. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Göran Strand